39 results match your criteria Chemelectrochem[Journal]

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On the Resistances of a Slurry Electrode Vanadium Redox Flow Battery.

ChemElectroChem 2020 May 7;7(9):2165-2172. Epub 2020 May 7.

DWI-Leibniz Institute for Interactive Materials Forckenbeckstr. 50 52074 Aachen Germany.

We studied the half-cell performance of a slurry-based vanadium redox flow battery via the polarization and electrochemical impedance spectroscopy methods. First, the conductive static mixers are examined and lower ohmic and diffusion resistances are shown. Further analyses of the slurry electrodes for the catholyte (VO-VO) and anolyte (V-V) are presented for the graphite powder slurry containing up to 15. Read More

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http://dx.doi.org/10.1002/celc.202000242DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319485PMC

Benefits of Organo-Aqueous Binary Solvents for Redox Supercapacitors Based on Polyoxometalates.

ChemElectroChem 2020 Jun 10;7(11):2466-2476. Epub 2020 Jun 10.

Institute for Chemistry and Technology of Materials Graz University of Technology Stremayrgasse 9 8010 Graz Austria.

A novel redox electrolyte is proposed based on organo-aqueous solvent and a polyoxometalate (POM) redox moiety. The presence of dimethyl sulfoxide (DMSO) plays multiple roles in this system. Firstly, it enhances the cathodic electrochemical stability window by shifting the H evolution to lower potentials with respect to pure aqueous systems; secondly, it improves the reversibility of the redox reaction of the PWO anion at low potentials. Read More

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http://dx.doi.org/10.1002/celc.202000639DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319425PMC

Urine in Bioelectrochemical Systems: An Overall Review.

ChemElectroChem 2020 Mar 6;7(6):1312-1331. Epub 2020 Mar 6.

Bristol BioEnergy Centre Bristol Robotics Laboratory, T-Block, UWE Coldharbour Lane Bristol BS16 1QY UK.

In recent years, human urine has been successfully used as an electrolyte and organic substrate in bioelectrochemical systems (BESs) mainly due of its unique properties. Urine contains organic compounds that can be utilised as a fuel for energy recovery in microbial fuel cells (MFCs) and it has high nutrient concentrations including nitrogen and phosphorous that can be concentrated and recovered in microbial electrosynthesis cells and microbial concentration cells. Moreover, human urine has high solution conductivity, which reduces the ohmic losses of these systems, improving BES output. Read More

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http://dx.doi.org/10.1002/celc.201901995DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7161917PMC

Paper-Based Microfluidics for Electrochemical Applications.

ChemElectroChem 2020 Jan 18;7(1):10-30. Epub 2019 Nov 18.

Ernst-Berl-Institut für Technische und Makromolekulare Chemie, Department of Chemistry Technische Universität Darmstadt Alarich-Weiss-Straße 8 64287 Darmstadt Germany.

Paper-based microfluidics is characteristic of fluid transportation through spontaneous capillary action of paper and has exhibited great promise for a variety of applications especially for sensing. Furthermore, paper-based microfluidics enables the design of miniaturized electrochemical devices to be applied in the energy sector, which is especially attractive for the rapid growing market of small size disposable electronics. This review gives a brief summary on the basics of paper chemistry and capillary-driven microfluidic behavior, and highlights recent advances of paper-based microfluidics in developing electrochemical sensing devices and miniaturized energy storage/conversion devices. Read More

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http://dx.doi.org/10.1002/celc.201901495DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6988477PMC
January 2020

Electrochemical Collisions of Individual Graphene Oxide Sheets: An Analytical and Fundamental Study.

ChemElectroChem 2020 Jan 17;7(1):69-73. Epub 2019 Dec 17.

MESA+ Institute for Nanotechnology University of Twente P.O. Box 127 7500 AE Enschede The Netherlands.

We propose an analytical method based on electrochemical collisions to detect individual graphene oxide (GO) sheets in an aqueous suspension. The collision rate is found to exhibit a complex dependence on redox mediator and supporting electrolyte concentrations. The analysis of multiple collision events in conjunction with numerical simulations allows quantitative information to be extracted, such as the molar concentration of GO sheets in suspension and an estimate of the size of individual sheets. Read More

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http://dx.doi.org/10.1002/celc.201901606DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6973065PMC
January 2020

Dynamic Impedance Spectroscopy of Nickel Hexacyanoferrate Thin Films.

ChemElectroChem 2019 Oct 20;6(21):5387-5395. Epub 2019 Aug 20.

Universität Bremen, Energiespeicher- und Energiewandlersysteme Bibliothekstr. 1 28359 Bremen Germany.

Dynamic multi-frequency analysis (DMFA) is capable of acquiring high-quality frequency response of electrochemical systems under non-stationary conditions in a broad range of frequencies. In this work, we used DMFA to study the kinetics of (de-)intercalation of univalent cations (Na and K) in thin films of nickel hexacyanoferrate (NiHCF) during cyclic voltammetry. For this system, the classic stationary electrochemical impedance spectroscopy fails due to the instability of the oxidized form of NiHCF. Read More

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http://dx.doi.org/10.1002/celc.201900805DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6919401PMC
October 2019

The Development of Biophotovoltaic Systems for Power Generation and Biological Analysis.

ChemElectroChem 2019 Oct 18;6(21):5375-5386. Epub 2019 Sep 18.

Department of Biochemistry University of Cambridge Tennis Court Road Cambridge CB2 1QW UK.

Biophotovoltaic systems (BPVs) resemble microbial fuel cells, but utilise oxygenic photosynthetic microorganisms associated with an anode to generate an extracellular electrical current, which is stimulated by illumination. Study and exploitation of BPVs have come a long way over the last few decades, having benefited from several generations of electrode development and improvements in wiring schemes. Power densities of up to 0. Read More

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http://dx.doi.org/10.1002/celc.201900997DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6899825PMC
October 2019

Studying direct electron transfer by site-directed immobilization of cellobiose dehydrogenase.

ChemElectroChem 2019 Feb 30;6(3):700-713. Epub 2019 Jan 30.

School of Chemistry, University of Southampton, Southampton, SO17 1BJ UK.

Covalent coupling between a surface exposed cysteine residue and maleimide groups was used to immobilize variants of cellobiose dehydrogenase (CDH) at multiwall carbon nanotube electrodes. By introducing individual cysteine residues at particular places on the surface of the flavodehydrogenase domain of the flavocytochrome we are able to immobilize the different variants in different orientations. Our results show that direct electron transfer (DET) occurs exclusively through the haem cofactor and that the redox potential of the haem is unaffected by the orientation of the enzyme. Read More

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http://dx.doi.org/10.1002/celc.201801503DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6837870PMC
February 2019

Electrochemical Flash Fluorination and Radiofluorination.

ChemElectroChem 2018 Nov 30;5(22):3353-3356. Epub 2018 Aug 30.

Department of Molecular and Medical Pharmacology, University of California, Los Angeles, California 90095, USA.

A new method for rapid late-stage fluorination using the cation pool technique is presented. Fluorination and no-carrier-added radiofluorination of methyl (phenylthio) acetate, methyl 2-(methylthio) acetate, and methyl 2-(ethylthio) acetate were performed. The carbocations formed through electrochemical oxidation were stabilized by using a divided electrochemical cell and 2,2,2-trifluoroethanol (TFE) as the solvent at -20 °C. Read More

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http://dx.doi.org/10.1002/celc.201800973DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6716519PMC
November 2018
1 Read

Bismuth Oxychloride Nanoplatelets by Breakdown Anodization.

ChemElectroChem 2019 Jan 31;6(2):336-341. Epub 2018 Oct 31.

Center of Materials and Nanotechnologies Faculty of Chemical Technology University of Pardubice Nam. Cs. Legii 565 53002 Pardubice Czech Republic).

Herein, the synthesis of BiOCl nanoplatelets of various dimensions is demonstrated. These materials were prepared by anodic oxidation of Bi ingots in diluted HCl under dielectric breakdown conditions, triggered by a sufficiently high anodic field. Additionally, it is shown that the use of several other common diluted acids (HNO, HSO, lactic acid) resulted in the formation of various different nanostructures. Read More

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http://doi.wiley.com/10.1002/celc.201801280
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http://dx.doi.org/10.1002/celc.201801280DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6468268PMC
January 2019
10 Reads

Direct Electron Transfer of Enzymes Facilitated by Cytochromes.

Authors:
Su Ma Roland Ludwig

ChemElectroChem 2019 Feb 13;6(4):958-975. Epub 2018 Dec 13.

Biocatalysis and Biosensing Laboratory Department of Food Science and Technology BOKU - University of Natural Resources and Life Sciences Muthgasse 18 1190 Vienna Austria.

The direct electron transfer (DET) of enzymes has been utilized to develop biosensors and enzymatic biofuel cells on micro- and nanostructured electrodes. Whereas some enzymes exhibit direct electron transfer between their active-site cofactor and an electrode, other oxidoreductases depend on acquired cytochrome domains or cytochrome subunits as built-in redox mediators. The physiological function of these cytochromes is to transfer electrons between the active-site cofactor and a redox partner protein. Read More

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http://dx.doi.org/10.1002/celc.201801256DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472588PMC
February 2019
1 Read

Towards more Durable Electrochemical Capacitors by Elucidating the Ageing Mechanisms under Different Testing Procedures.

ChemElectroChem 2019 Jan 7;6(2):566-573. Epub 2018 Nov 7.

Electrochemistry Laboratory Paul Scherrer Institut 5232 Villigen Switzerland.

Electrical double-layer capacitors (EDLCs) commonly denoted supercapacitors are rechargeable energy storage devices with excellent power and energy delivery metrics intermediate to conventional capacitors and batteries. High-voltage aqueous electrolyte based EDLCs are particularly attractive due to their high-power capability, facile production, and environmental advantages. EDLCs should last for thousands of cycles and evaluation of future cell chemistries require long-term and costly galvanostatic cycling. Read More

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http://dx.doi.org/10.1002/celc.201801146DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472632PMC
January 2019

Minimization of Catalyst Loading on Regenerative Fuel Cell Positive Electrodes Based on Titanium Felts using Atomic Layer Deposition.

ChemElectroChem 2018 Dec 23;5(24):3932-3937. Epub 2018 Oct 23.

Departement of Chemistry and Pharmacy Friedrich-Alexander University Erlangen-Nürnberg Egerlandstrasse 3a 91058 Erlangen Germany.

We present the preparation and electrochemical analysis of a novel type of positive regenerative fuel cell electrode based on commercially available Ti felts with a Pt/Ir catalyst. Anodic oxidation of the Ti felts leads to the formation of a TiO nanotube layer. The high specific surface area allows for a particularly efficient utilization of the noble metal catalyst. Read More

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http://dx.doi.org/10.1002/celc.201801220DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6360520PMC
December 2018
1 Read

Effect of Ba Content on the Activity of La Ba MnO Towards the Oxygen Reduction Reaction.

ChemElectroChem 2018 Jul 6;5(14):1922-1927. Epub 2018 Apr 6.

School of Chemistry University of Bristol Cantocks Close Bristol BS8 1TS UK.

The electrocatalytic activity of La Ba MnO nanoparticles towards the oxygen reduction reaction (ORR) is investigated as a function of the A-site composition. Phase-pure oxide nanoparticles with a diameter in the range of 40 to 70 nm were prepared by using an ionic liquid route and deposited onto mesoporous carbon films. The structure and surface composition of the nanoparticles are probed by XRD, TEM, EDX, and XPS. Read More

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http://doi.wiley.com/10.1002/celc.201800052
Publisher Site
http://dx.doi.org/10.1002/celc.201800052DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6146913PMC
July 2018
26 Reads

Electrodeposition of Gold Nanostructures at the Interface of a Pickering Emulsion.

ChemElectroChem 2018 Aug 17;5(15):2055-2058. Epub 2018 May 17.

Department of Chemistry University of Liverpool Liverpool L69 7ZD UK.

The controlled electrodeposition of nanoparticles at the surface of an emulsion droplet offers enticing possibilities in regards to the formation of intricate structures or fine control over the locus or duration of nanoparticle growth. In this work we develop electrochemical control over the spontaneous reduction of aqueous phase Au(III) by heterogeneous electron transfer from decamethylferrocene present in an emulsion droplet - resulting in the growth of nanoparticles. As gold is a highly effective conduit for the passage of electrical current, even on the nanoscale, the deposition significantly enhances the current response for the single electron transfer of decamethylferrocene when acting as a redox indicator. Read More

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http://dx.doi.org/10.1002/celc.201800398DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6099388PMC
August 2018
20 Reads

Highly Reversible Water Oxidation at Ordered Nanoporous Iridium Electrodes Based on an Original Atomic Layer Deposition.

ChemElectroChem 2018 May 27;5(9):1259-1264. Epub 2018 Feb 27.

Departement of Chemistry and Pharmacy Friedrich-Alexander University Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany.

Nanoporous iridium electrodes are prepared and electrochemically investigated towards the water oxidation (oxygen evolution) reaction. The preparation is based on 'anodic' aluminum oxide templates, which provide straight, cylindrical nanopores. Their walls are coated using atomic layer deposition (ALD) with a newly developed reaction which results in a metallic iridium layer. Read More

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http://dx.doi.org/10.1002/celc.201800152DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5947304PMC
May 2018
8 Reads

Stability of CoP Electrocatalysts in Continuous and Interrupted Acidic Electrolysis of Water.

ChemElectroChem 2018 Apr 22;5(8):1230-1239. Epub 2018 Feb 22.

Laboratory of Inorganic Materials Chemistry, Department of Chemical Engineering and Chemistry Eindhoven University of Technology P.O. Box 513 5600MB Eindhoven The Netherlands.

Cobalt phosphides are an emerging earth-abundant alternative to platinum-group-metal-based electrocatalysts for the hydrogen evolution reaction (HER). Yet, their stability is inferior to platinum and compromises the large-scale applicability of CoP in water electrolyzers. In the present study, we employed flat, thin CoP electrodes prepared through the thermal phosphidation (PH) of CoO films made by plasma-enhanced atomic layer deposition to evaluate their stability in acidic water electrolysis by using a multi-technique approach. Read More

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http://dx.doi.org/10.1002/celc.201701119DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5915747PMC
April 2018
26 Reads

Conserved Histidine Adjacent to the Proximal Cluster Tunes the Anaerobic Reductive Activation of Membrane-Bound [NiFe] Hydrogenase-1.

ChemElectroChem 2018 Mar 16;5(6):855-860. Epub 2018 Feb 16.

Department of Chemistry University of York Heslington, York.

[NiFe] hydrogenases are electrocatalysts that oxidize H at a rapid rate without the need for precious metals. All membrane-bound [NiFe] hydrogenases (MBH) possess a histidine residue that points to the electron-transfer iron sulfur cluster closest ("proximal") to the [NiFe] H-binding active site. Replacement of this amino acid with alanine induces O sensitivity, and this has been attributed to the role of the histidine in enabling the reversible O-induced over-oxidation of the [FeSCys] proximal cluster possessed by all O-tolerant MBH. Read More

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http://dx.doi.org/10.1002/celc.201800047DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5900901PMC
March 2018
9 Reads

Improved Performance of Ionic Liquid Supercapacitors by using Tetracyanoborate Anions.

ChemElectroChem 2018 Feb 4;5(4):598-604. Epub 2018 Jan 4.

Chemical and Biological EngineeringUniversity of Sheffield, Sir Robert Hadfield BuildingMappin StreetSheffieldS1 3JDEngland, UK.

Supercapacitors are energy storage devices designed to operate at higher power densities than conventional batteries, but their energy density is still too low for many applications. Efforts are made to design new electrolytes with wider electrochemical windows than aqueous or conventional organic electrolytes in order to increase energy density. Ionic liquids (ILs) with wide electrochemical stability windows are excellent candidates to be employed as supercapacitor electrolytes. Read More

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http://dx.doi.org/10.1002/celc.201701164DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5861663PMC
February 2018
18 Reads

Immittance Data Validation by Kramers-Kronig Relations - Derivation and Implications.

Authors:
T Malkow

ChemElectroChem 2017 Nov 27;4(11):2777-2782. Epub 2017 Sep 27.

European CommissionDirectorate-General Joint Research CentreWesterduinweg 31755LE PettenThe Netherlands.

Explicitly based on causality, linearity (superposition) and stability (time invariance) and implicit on continuity (consistency), finiteness (convergence) and uniqueness (single valuedness) in the time domain, Kramers-Kronig (KK) integral transform (KKT) relations for immittances are derived as pure mathematical constructs in the complex frequency domain using the two-sided (bilateral) Laplace integral transform (LT) reduced to the Fourier domain for sufficiently rapid exponential decaying, bounded immittances. Novel anti KK relations are also derived to distinguish LTI (linear, time invariant) systems from non-linear, unstable and acausal systems. All relations can be used to test KK transformability on the LTI principles of linearity, stability and causality of measured and model data by Fourier transform (FT) in immittance spectroscopy (IS). Read More

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http://dx.doi.org/10.1002/celc.201700630DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5861665PMC
November 2017
1 Read

Immittance Data Validation using Fast Fourier Transformation (FFT) Computation - Synthetic and Experimental Examples.

ChemElectroChem 2017 Nov 27;4(11):2771-2776. Epub 2017 Sep 27.

European CommissionDirectorate-General Joint Research CentreWesterduinweg 31755 LEPettenThe Netherlands.

Exact data of an electric circuit (EC) model of RLC (resistor, inductor, capacitor) elements representing rational immittance of LTI (linear, time invariant) systems are numerically Fourier transformed to demonstrate within error bounds applicability of the Hilbert integral tranform (HT) and Kramers-Kronig (KK) integral tranform (KKT) method. Immittance spectroscopy (IS) data are validated for their HT (KKT) compliance using non-equispaced fast Fourier transformation (NFFT) computations. Failing of HT (KKT) testing may not only stem from non-compliance with causality, stability and linearity which are readily distinguished using anti HT (KKT) relations. Read More

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http://dx.doi.org/10.1002/celc.201700629DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5861679PMC
November 2017

Quantitative Electrochemical DNA Microarray on a Monolith Electrode with Ten Attomolar Sensitivity, 100% Specificity, and Zero Background.

ChemElectroChem 2018 Feb 26;5(3):429-433. Epub 2017 Nov 26.

Chemical Engineering, University of Nebraska Lincoln, NE 68588 USA.

Circulating microRNA are promising diagnostic and prognostic biomarkers of disease in quantitative blood tests. A label-free, PCR-free, electrochemical microarray technology on a monolith electrode is described, with 10 attomolar (aM) sensitivity and responsiveness to binding of <1 zeptomole of target to immobilized ssDNA probes with zero background. Specificity is 100% in a mixture with five nonspecific miRNA each with a 10-fold higher concentration. Read More

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http://dx.doi.org/10.1002/celc.201700983DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6541448PMC
February 2018
2 Reads

Toward Wearable Energy Storage Devices: Paper-Based Biofuel Cells based on a Screen-Printing Array Structure.

ChemElectroChem 2017 Oct 26;4(10):2460-2463. Epub 2017 Jun 26.

Department of Pure and Applied ChemistryFaculty of Science and TechnologyTokyo University of Science2641, YamazakiNoda, Chiba278-8510Japan.

A novel paper-based biofuel cell with a series/parallel array structure has been fabricated, in which the cell voltage and output power can easily be adjusted as required by printing. The output of the fabricated 4-series/4-parallel biofuel cell reached 0.97±0. Read More

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http://dx.doi.org/10.1002/celc.201700561DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5708273PMC
October 2017
8 Reads

Exploring Step-by-Step Assembly of Nanoparticle:Cytochrome Biohybrid Photoanodes.

ChemElectroChem 2017 Aug 15;4(8):1959-1968. Epub 2017 May 15.

School of Biomedical Sciences, and The Astbury Centre for Structural Molecular BiologyUniversity of LeedsLeedsLS2 9JTU.K.

Coupling light-harvesting semiconducting nanoparticles (NPs) with redox enzymes has been shown to create artificial photosynthetic systems that hold promise for the synthesis of solar fuels. High quantum yields require efficient electron transfer from the nanoparticle to the redox protein, a property that can be difficult to control. Here, we have compared binding and electron transfer between dye-sensitized TiO nanocrystals or CdS quantum dots and two decaheme cytochromes on photoanodes. Read More

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http://dx.doi.org/10.1002/celc.201700030DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5573906PMC
August 2017
131 Reads

Raman Under Water - Nonlinear and Nearfield Approaches for Electrochemical Surface Science.

ChemElectroChem 2017 Aug 9;4(8):1814-1823. Epub 2017 Jun 9.

Max Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany.

Electrochemistry is re-gaining attention among scientists because the complex interplay between electronic and chemical interfacial processes lies at the bottom of a broad range of important research disciplines like alternative energy conversion or green catalysis and synthesis. While rapid progress has been made in recent years regarding novel technological applications, the community increasingly recognizes that the understanding of the molecular processes that govern macroscopic device properties is still rather limited - which hinders a systematic and more complete exploration of novel material and functionality space. Here, we discuss advanced Raman spectroscopies as valuable analysis tools for electrochemists. Read More

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http://dx.doi.org/10.1002/celc.201700293DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5575488PMC
August 2017
52 Reads

Electrochemistry of Redox-Active Guest Molecules at β-Cyclodextrin-Functionalized Silicon Electrodes.

ChemElectroChem 2017 Jun 4;4(6):1470-1477. Epub 2017 Apr 4.

Molecular NanoFabrication GroupMESA+ Institute for Nanotechnology, University of TwenteP.O. Box 2177500 AEEnschedeThe Netherlands.

Functionalization of silicon-based sensing devices with self-assembled receptor monolayers offers flexibility and specificity towards the requested analyte as well as the possibility of sensor reuse. As electrical sensor performance is determined by electron transfer, we functionalized H-terminated silicon substrates with β-cyclodextrin (β-CD) molecules to investigate the electronic coupling between these host monolayers and the substrate. A trivalent (one ferrocene and two adamantyl moieties), redox-active guest was bound to the β-CD surface with a coverage of about 10 mol/cm and an overall binding constant of 1. Read More

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http://doi.wiley.com/10.1002/celc.201600872
Publisher Site
http://dx.doi.org/10.1002/celc.201600872DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5485161PMC
June 2017
7 Reads

Heterogeneous Electron-Transfer Rates for the Reduction of Viologen Derivatives at Platinum and Bismuth Electrodes in Acetonitrile.

ChemElectroChem 2017 Feb 25;4(2):320-331. Epub 2016 Nov 25.

Chemical Nanoscience LaboratorySchool of Chemistry, Bedson BuildingNewcastle UniversityNewcastle upon TyneNE1 7RUUK.

The standard heterogeneous rate constants for the reduction of a series of viologen derivatives with a range of inter-ring torsion angles were measured at Bi and Pt electrodes. The electrode potentials for the first one-electron reduction of the viologens vary from -684 mV to -1070 mV vs. Ag/0. Read More

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http://dx.doi.org/10.1002/celc.201600536DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5467523PMC
February 2017
1 Read

Electrocatalytic Oxidation of Alcohols, Tripropylamine, and DNA with Ligand-Free Gold Nanoclusters on Nitrided Carbon.

ChemElectroChem 2016 Dec 20;3(12):2100-2109. Epub 2016 Jul 20.

Department of Chemistry and GEMS Center, University of Connecticut, Storrs, CT 06269 (USA).

Electrocatalytic properties of ligand-free gold nanoclusters (AuNCs, <2 nm) grown on nitrided carbon supports (denoted as AuNCs@N-C) were evaluated for the oxidation of representative organic molecules including alcohols, an amine, and deoxyguanosine in oligonucleotides. AuNCs@N-C catalysts were incorporated into films of architecture {PDDA/AuNCs@N-C} by using layer-by-layer assembly with oppositely charged poly(diallyldimethylammonium) (PDDA) on pyrolytic graphite (PG) electrodes. Cyclic voltammetry and electrochemical impedance spectroscopy (EIS) were used to survey the electrocatalytic properties of these AuNCs@N-C films. Read More

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http://doi.wiley.com/10.1002/celc.201600283
Publisher Site
http://dx.doi.org/10.1002/celc.201600283DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5422001PMC
December 2016
29 Reads

Electrochemical Infilling of CuInSe within TiO Nanotube Layers and Subsequent Photoelectrochemical Studies.

ChemElectroChem 2017 Mar 8;4(3):495-499. Epub 2017 Feb 8.

Center of Materials and Nanotechnologies Faculty of Chemical Technology University of Pardubice Nam. Cs. Legii 565 53002 Pardubice Czech Republic.

Anodic self-organized TiO nanotube layers (with different aspect ratios) were electrochemically infilled with CuInSe nanocrystals with the aim to prepare heterostructures with a photoelectrochemical response in the visible light. The resulting heterostructure assembly was confirmed by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). High incident photon-to-electron conversion efficiency values exceeding 55% were obtained in the visible-light region. Read More

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http://dx.doi.org/10.1002/celc.201600763DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5363378PMC
March 2017
46 Reads

A Re-evaluation of Electron-Transfer Mechanisms in Microbial Electrochemistry: Releases Iron that Mediates Extracellular Electron Transfer.

ChemElectroChem 2016 May 19;3(5):829-835. Epub 2016 Feb 19.

School of Biomedical Sciences and the Astbury Centre for Structural Molecular Biology University of Leeds Leeds LS2 9JT UK.

Exoelectrogenic bacteria can couple their metabolism to extracellular electron acceptors, including macroscopic electrodes, and this has applications in energy production, bioremediation and biosensing. Optimisation of these technologies relies on a detailed molecular understanding of extracellular electron-transfer (EET) mechanisms, and MR-1 (MR-1) has become a model organism for such fundamental studies. Here, cyclic voltammetry was used to determine the relationship between the surface chemistry of electrodes (modified gold, ITO and carbon electrodes) and the EET mechanism. Read More

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http://dx.doi.org/10.1002/celc.201500505DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5021177PMC
May 2016
7 Reads

Rechargeable Metal-Air Proton-Exchange Membrane Batteries for Renewable Energy Storage.

ChemElectroChem 2016 Feb 25;3(2):247-255. Epub 2015 Nov 25.

Graduate School of Environmental Studies Nagoya University Nagoya 464-8601 Japan.

Rechargeable proton-exchange membrane batteries that employ organic chemical hydrides as hydrogen-storage media have the potential to serve as next-generation power sources; however, significant challenges remain regarding the improvement of the reversible hydrogen-storage capacity. Here, we address this challenge through the use of metal-ion redox couples as energy carriers for battery operation. Carbon, with a suitable degree of crystallinity and surface oxygenation, was used as an effective anode material for the metal redox reactions. Read More

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http://dx.doi.org/10.1002/celc.201500473DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964886PMC
February 2016
3 Reads

The Stability Challenge on the Pathway to Low and Ultra-Low Platinum Loading for Oxygen Reduction in Fuel Cells.

ChemElectroChem 2016 Jan 16;3(1):51-54. Epub 2015 Oct 16.

Department of Interface Chemistry and Surface Engineering Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Straße 1 40237 Düsseldorf Germany.

We report the influence of catalyst loading on rates of platinum degradation in acidic electrolyte at room temperature. A piezoelectric printer is used to deposit spotted arrays of a commercially available catalyst comprised of Pt nanoparticles on a porous carbon support. The kinetically controlled oxygen reduction reaction (ORR) activity at different loadings is measured using an electrochemical scanning flow cell (SFC), and found to be quite stable over the range of loadings studied. Read More

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http://dx.doi.org/10.1002/celc.201500425DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964881PMC
January 2016
8 Reads

Challenges in Accommodating Volume Change of Si Anodes for Li-Ion Batteries.

ChemElectroChem 2015 Nov 31;2(11):1645-1651. Epub 2015 Aug 31.

Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) 689-798, Ulsan (South Korea) E-mail:

Si has been considered as a promising alternative anode for next-generation Li-ion batteries (LIBs) because of its high theoretical energy density, relatively low working potential, and abundance in nature. However, Si anodes exhibit rapid capacity decay and an increase in the internal resistance, which are caused by the large volume changes upon Li insertion and extraction. This unfortunately limits their practical applications. Read More

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http://dx.doi.org/10.1002/celc.201500254DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964884PMC
November 2015
7 Reads

Apparent Oxygen Uphill Diffusion in LaSrMnO Thin Films upon Cathodic Polarization.

ChemElectroChem 2015 Oct 21;2(10):1487-1494. Epub 2015 Jul 21.

Institute of Chemical Technologies and Analytics Vienna University of Technology Getreidemarkt 9 Vienna A-1060 Austria.

The impact of cathodic bias on oxygen transport in LaSrMnO (LSM) thin films was investigated. Columnar-grown LSM thin films with different microstructures were deposited by pulsed laser deposition. O tracer experiments were performed on thin film microelectrodes with an applied cathodic bias of -300 or -450 mV, and the microelectrodes were subsequently analyzed by time-of-flight secondary ion mass spectrometry. Read More

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http://doi.wiley.com/10.1002/celc.201500167
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http://dx.doi.org/10.1002/celc.201500167DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964887PMC
October 2015
10 Reads

Dissolution of Platinum in the Operational Range of Fuel Cells.

ChemElectroChem 2015 Oct 5;2(10):1471-1478. Epub 2015 May 5.

Department of Interface Chemistry and Surface Engineering Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Straße 1 40237 Düsseldorf Germany.

One of the most important practical issues in low-temperature fuel-cell catalyst degradation is platinum dissolution. According to the literature, it initiates at 0.6-0. Read More

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http://dx.doi.org/10.1002/celc.201500098DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964885PMC
October 2015
55 Reads

Electrogenerated Chemiluminescence Reporting on Closed Bipolar Microelectrodes and the Influence of Electrode Size.

ChemElectroChem 2016 Mar 1;3(3):457-464. Epub 2015 Oct 1.

Department of Chemistry, University of Washington, Seattle, Washington, 98195-1700, United States.

We report a fundamental study of the use of Ru(bpy)-based electrogenerated chemiluminescence (ECL) as an optical reporting system for the detection of redox-active analyte on closed bipolar microelectrodes, focused on gaining an in-depth understanding of the correlation between ECL emission intensity and electrochemical current. We demonstrate the significant effect that the size of the anodic and cathodic poles has on the resulting ECL signal and show how this influences the quantitative detection of analyte on a closed bipolar electrode. By carefully designing the geometry of the bipolar electrode, the detection performance of the system can be tuned to different analyte concentration ranges. Read More

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http://doi.wiley.com/10.1002/celc.201500352
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http://dx.doi.org/10.1002/celc.201500352DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4972099PMC
March 2016
2 Reads

Ferrocene-Boronic Acid-Fructose Binding Based on Dual-Plate Generator-Collector Voltammetry and Square-Wave Voltammetry.

ChemElectroChem 2015 Jun 25;2(6):867-871. Epub 2015 Feb 25.

Department of Chemistry, University of Bath Claverton Down, Bath BA2 7AY (UK) E-mail:

The interaction of ferrocene-boronic acid with fructose is investigated in aqueous 0.1 m phosphate buffer at pH 7, 8 and 9. Two voltammetric methods, based on 1) a dual-plate generator-collector micro-trench electrode (steady state) and 2) a square-wave voltammetry (transient) method, are applied and compared in terms of mechanistic resolution. Read More

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http://dx.doi.org/10.1002/celc.201500016DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964879PMC
June 2015
48 Reads

An Electrochemical Strategy to Measure the Thickness of Electroactive Microbial Biofilms.

Authors:
Diego Millo

ChemElectroChem 2015 Feb 12;2(2):288-291. Epub 2015 Jan 12.

Department of Physics and Astronomy, VU University Amsterdam De Boelelaan 1081, 1081 HV, Amsterdam (The Netherlands) E-mail:

The study of electroactive microbial biofilms often requires knowledge of the biofilm thickness. Unfortunately, this parameter is, nowadays, only accessible through expensive microscopic techniques. This work overcomes this limitation by presenting a new strategy, exploiting the use of chronoamperometry (CA) alone. Read More

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http://dx.doi.org/10.1002/celc.201402425DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964880PMC
February 2015

Investigation of Electron Transfer by Biofilms by using an Electrochemical Quartz Crystal Microbalance.

ChemElectroChem 2014 Nov 8;1(11):2007-2016. Epub 2014 Aug 8.

The Gene and Linda Voiland School of Chemical Engineering and Bioengineering PO Box 646515, Washington State University, Pullman, WA 99164-6515 (USA) E-mail:

Both the short- and long-term electron-transfer processes of electrode-respiring biofilms are demonstrated by using an electrochemical quartz crystal microbalance (QCM). The QCM monitors the frequency shift from the initial resonant frequency (background) in real time, while the current increases, because of biofilm growth. In the short term, the frequency shift is linear with respect to current for the biofilm. Read More

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http://dx.doi.org/10.1002/celc.201402127DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964883PMC
November 2014
6 Reads
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