18 results match your criteria Catalysis Letters[Journal]

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A Rotavirus Virus-Like Particle Confined Palladium Nanoreactor and Its Immobilization on Graphene Oxide for Catalysis.

Catal Letters 2020 May 14:1-11. Epub 2020 May 14.

2Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, 213164 China.

Abstract: In this work, a new viral protein cage based nanoreactor was successfully constructed via encapsulating Tween 80 stabilized palladium nanoparticles (NPs) into rotavirus capsid VP2 virus-like particles (i.e. Pd@VP2). Read More

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http://dx.doi.org/10.1007/s10562-020-03252-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7223084PMC

Single-Atom Catalysis: How Structure Influences Catalytic Performance.

Catal Letters 2019 25;149(5):1137-1146. Epub 2019 Feb 25.

Institute of Applied Physics, TU Wien, Vienna, Austria.

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http://link.springer.com/10.1007/s10562-019-02709-7
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http://dx.doi.org/10.1007/s10562-019-02709-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432890PMC
February 2019
20 Reads

Impregnated and Co-precipitated Pd-GaO, Pd-InO and Pd-GaO-InO Catalysts: Influence of the Microstructure on the CO Selectivity in Methanol Steam Reforming.

Catal Letters 2018 3;148(10):3062-3071. Epub 2018 Aug 3.

1Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, 6020 Innsbruck, Austria.

Abstract: To focus on the influence of the intermetallic compound-oxide interface of Pd-based intermetallic phases in methanol steam reforming (MSR), a co-precipitation pathway has been followed to prepare and subsequently structurally and catalytically characterize a set of nanoparticulate GaO- and InO-supported GaPd and InPd catalysts, respectively. To study the possible promoting effect of InO, an InO-doped GaO-supported GaPd catalyst has also been examined. While, upon reduction, the same intermetallic compounds are formed, the structure of especially the GaO support is strikingly different: rhombohedral and spinel-like GaO phases, as well as hexagonal GaInO and rhombohedral InO phases are observed locally on the materials prior to methanol steam reforming by high-resolution transmission electron microscopy. Read More

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http://dx.doi.org/10.1007/s10562-018-2491-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6191075PMC
August 2018
3 Reads

Heterogeneous Surfaces as Structure and Particle Size Libraries of Model Catalysts.

Catal Letters 2018 31;148(10):2947-2956. Epub 2018 Jul 31.

Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9, 1060 Vienna, Austria.

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http://dx.doi.org/10.1007/s10562-018-2506-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6191079PMC
July 2018
4 Reads

Tuning Pd-nanoparticle@MIL-101(Cr) Catalysts for Tandem Reductive Amination.

Catal Letters 2018 27;148(1):154-163. Epub 2017 Nov 27.

EaStCHEM School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St. Andrews, Fife KY16 9ST UK.

Abstract: The versatility of MOFs as highly porous Lewis acidic supports for precious metal nanoparticles has been exploited for one-pot tandem reductive amination catalysis. MIL-101(Cr) loaded with Pd nanoparticles ca. 3 nm in size at 0. Read More

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http://dx.doi.org/10.1007/s10562-017-2208-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6566290PMC
November 2017

Role of Support Oxygen Vacancies in the Gas Phase Hydrogenation of Furfural over Gold.

Catal Letters 2018 23;148(1):90-96. Epub 2017 Oct 23.

Chemical Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS Scotland, UK.

Abstract: We have examined the role of support oxygen vacancies in the gas phase hydrogenation of furfural over Au/TiO and Au/CeO prepared by deposition-precipitation. Both catalysts exhibited a similar Au particle size distribution (1-6 nm) and mean (2.8-3. Read More

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http://dx.doi.org/10.1007/s10562-017-2228-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6560467PMC
October 2017
1 Read

Methane Cracking over Cobalt Molybdenum Carbides.

Catal Letters 2018 21;148(6):1643-1650. Epub 2018 Apr 21.

1WestCHEM, School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ UK.

Abstract: The catalytic behaviour of CoMoC, CoMoC, CoMoN and CoMoN for methane cracking has been studied to determine the relationship between the methane cracking activity and the chemical composition. The characterisation of post-reaction samples showed a complex phase composition with the presence of CoMoC, α-Co and β-MoC as catalytic phases and the deposition of different forms of carbon during reaction.

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http://dx.doi.org/10.1007/s10562-018-2378-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6448361PMC
April 2018
1 Read

Palladium Promoted Production of Higher Amines from a Lower Amine Feedstock.

Catal Letters 2017 14;147(4):803-810. Epub 2017 Feb 14.

Chemical Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS Scotland, UK.

Abstract: The catalytic (Pd/AlO and Pd/C; mean Pd size 2.5-3.0 nm from (S)TEM analysis) synthesis of di-butylamine (DBA) and tri-butylamine (TBA) from mono-butylamine (MBA) and DBA, respectively, in continuous gas phase operation is demonstrated. Read More

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http://dx.doi.org/10.1007/s10562-016-1902-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7089641PMC
February 2017

A Computational Study of the Heterogeneous Synthesis of Hydrazine on CoMoN.

Catal Letters 2017 24;147(7):1820-1826. Epub 2017 May 24.

1Kathleen Lonsdale Materials Chemistry, Department of Chemistry, University College London, London, WC1H 0AJ UK.

Abstract: Periodic and molecular density functional theory calculations have been applied to elucidate the associative mechanism for hydrazine and ammonia synthesis in the gas phase and hydrazine formation on CoMoN. We find that there are two activation barriers for the associative gas phase mechanism with barriers of 730 and 658 kJ/mol, corresponding to a hydrogenation step from N to NNH and HNNH to HNNH, respectively. The second step of the mechanism is barrierless and an important intermediate, NNH, can also readily form on CoMoN surfaces via the Eley-Rideal chemisorption of H on a pre-adsorbed N at nitrogen vacancies. Read More

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http://dx.doi.org/10.1007/s10562-017-2080-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6979644PMC

Recent approaches for bridging the pressure gap in photoelectron microspectroscopy.

Catal Letters 2016 Mar 29;59(5):448-468. Epub 2016 Jan 29.

Technische Universität München, Chemie Department, Lichtenbergstr. D-85748 Garching, Germany.

Ambient-pressure photoelectron spectroscopy (APPES) and microscopy are at the frontier of modern chemical analysis at liquid-gas, solid-liquid and solid-gas interfaces, bridging science and engineering of functional materials. Complementing the current state-of-the art of the instruments, we survey in this short review several alternative APPES approaches, developed recently in the scanning photoelectron microscope (SPEM) at the Elettra laboratory. In particular, we report on experimental setups for dynamic near-ambient pressure environment, using pulsed-gas injection in the vicinity of samples or reaction cells with very small apertures, allowing for experiments without introducing additional differential pumping stages. Read More

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http://dx.doi.org/10.1007/s11244-015-0519-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5165702PMC
March 2016
5 Reads

Application of Inelastic Neutron Scattering to the Methanol-to-Gasoline Reaction Over a ZSM-5 Catalyst.

Catal Letters 2016 15;146(7):1242-1248. Epub 2016 Apr 15.

5School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ UK.

Abstract: Inelastic neutron scattering (INS) is used to investigate a ZSM-5 catalyst that has been exposed to methanol vapour at elevated temperature. In-line mass spectrometric analysis of the catalyst exit stream confirms methanol-to-gasoline chemistry, whilst ex situ INS measurements detect hydrocarbon species formed in/on the catalyst during methanol conversion. These preliminary studies demonstrate the capability of INS to complement infrared spectroscopic characterisation of the hydrocarbon pool present in/on ZSM-5 during the MTG reaction. Read More

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http://dx.doi.org/10.1007/s10562-016-1742-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7175671PMC

Hydrogen Oxidation on Stepped Rh Surfaces: µm-Scale versus Nanoscale.

Catal Letters 2016 23;146(10):1867-1874. Epub 2016 Aug 23.

1Institute of Materials Chemistry, Technische Universität Wien, 1060 Vienna, Austria.

Abstract: The catalytic H oxidation reaction on stepped Rh surfaces in the 10 mbar pressure range was studied in situ on individual high-Miller-index domains of a polycrystalline Rh foil by PEEM (photoemission electron microscopy) and on a Rh nanotip by FIM/FEM (field-ion/field-emission microscopy). The activity, particularly the tolerance to poisoning by oxygen, was found to strongly depend on the density of steps and defects, as well as on the size of the catalytically active surfaces.

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http://dx.doi.org/10.1007/s10562-016-1824-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7175702PMC

EPR Spectroscopic Studies of [FeFe]-Hydrogenase Maturation.

Catal Letters 2015 Sep 30;58(12):699-707. Epub 2015 Jul 30.

Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616, USA.

Proton reduction and H oxidation are key elementary reactions for solar fuel production. Hydrogenases interconvert H and H with remarkable efficiency and have therefore received much attention in this context. For [FeFe]-hydrogenases, catalysis occurs at a unique cofactor called the H-cluster. Read More

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http://link.springer.com/10.1007/s11244-015-0412-y
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http://dx.doi.org/10.1007/s11244-015-0412-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4618401PMC
September 2015
39 Reads

Surface- and Tip-Enhanced Raman Spectroscopy as Operando Probes for Monitoring and Understanding Heterogeneous Catalysis.

Catal Letters 2015;145(1):40-57. Epub 2014 Nov 16.

Inorganic Chemistry and Catalysis group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands.

Abstract: Surface-enhanced Raman spectroscopy (SERS) and tip-enhanced Raman spectroscopy (TERS) were until recently limited in their applicability to the majority of heterogeneous catalytic reactions. Recent developments begin to resolve the conflicting experimental requirements for SERS and TERS on the one hand, and heterogeneous catalysis on the other hand. This article discusses the development and use of SERS and TERS to study heterogeneous catalytic reactions, and the exciting possibilities that may now be within reach thanks to the latest technical developments. Read More

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http://dx.doi.org/10.1007/s10562-014-1420-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4449125PMC
November 2014
4 Reads

High Surface Area Ceria for CO Oxidation Prepared from Cerium -Butoxide by Combined Sol-Gel and Solvothermal Processing.

Catal Letters 2014 17;144(3):403-412. Epub 2013 Dec 17.

Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Wien, Austria.

Abstract: CeO was synthesized by combined sol-gel and solvothermal processing of gels obtained from acetaldoximate-modified cerium(IV) -butoxide in the presence of the non-ionic surfactant Pluronic F127. The use of cerium(IV) -butoxide as precursor contrasts very favorably with the often used ceric ammonium nitrate and results in more reliable and tailorable properties of the final materials. The kind of post-synthesis treatment of the gels and the composition of the precursor mixture proved to be crucial for obtaining high surface area ceria with a high Ce proportion. Read More

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http://dx.doi.org/10.1007/s10562-013-1162-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3919642PMC
December 2013
12 Reads

Infrared Studies on Bimetallic Copper/Nickel Catalysts Supported on Zirconia and Ceria/Zirconia.

Catal Letters 2013 Jun 6;143(6):517-530. Epub 2013 Apr 6.

Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9 BC01, 1060 Vienna, Austria.

Abstract: Infrared spectroscopy has been employed for a detailed characterization of ZrO and CeO/ZrO supported nickel and copper/nickel catalysts to be utilized for methane decomposition. Adsorption of CO at 303 K was performed in order to determine the surface composition and accessible adsorption sites. Alloy formation occurred during reduction, as indicated by a red-shift of the vibrational band of CO on Ni: by 27 cm on nickel-rich CuNi alloy, by 34 cm on 1:1 Cu:Ni and by 36 cm on copper-rich CuNi alloy. Read More

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http://dx.doi.org/10.1007/s10562-013-1001-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3688307PMC
June 2013
41 Reads

Silicon Oxide Surface Segregation in CO Oxidation on Pd: An in situ PEEM, MS and XPS Study.

Catal Letters 2013 Mar 8;143(3):235-240. Epub 2013 Jan 8.

Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria ; Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.

Abstract: The effect of silicon oxide surface segregation on the locally-resolved kinetics of the CO oxidation reaction on individual grains of a polycrystalline Pd foil was studied in situ by PEEM, MS and XPS. The silicon oxide formation induced by Si-impurity segregation at oxidizing conditions, was monitored by XPS and its impact on the global and local (spatially resolved) kinetics of the CO oxidation was determined by MS and PEEM. The results reveal a drastic inhibiting effect of silicon oxide on the Pd reactivity towards CO oxidation, manifested both in the collapse of the global CO formation rate and in the modified local reactive properties of individual Pd micrograins. Read More

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http://dx.doi.org/10.1007/s10562-012-0955-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3584672PMC

Interaction of Perchloroethylene with Cerium Oxide in Three-Way Catalysts.

Catal Letters 2009 Sep;132(1-2):153-158

Department of Chemical and Environmental Engineering, The University of Arizona, 1133 E. James E. Rogers Way, Tucson, AZ 85721-0011, USA.

The role of cerium oxide on direct oxidation of perchloroethylene (PCE) by a three-way catalyst was explored. In the absence of an external oxidizing agent, PCE was oxidized over an alumina supported Pt/Rh three-way catalyst. We hypothesize that the chlorine atoms in the adsorbed PCE interact with oxygen in CeO(2), reducing the cerium to create CeCl(3). Read More

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http://dx.doi.org/10.1007/s10562-009-0084-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3016047PMC
September 2009
28 Reads
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