Publications by authors named "Yaxin Ji"

4 Publications

  • Page 1 of 1

Scalable Synthesis of WS2 Nanosheets for Alkali-acid Electrocatalytic Sulfion Recycle and H2 Generation.

Angew Chem Int Ed Engl 2021 Jul 21. Epub 2021 Jul 21.

Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Institute of Materials, 155 Yangqiao Road West, 350002, Fuzhou, CHINA.

WS 2 nanosheets hold great promise for a variety of applications yet face a grand challenge in implementing large-scale synthesis. We herein report a reliable, scalable, and high-yield (> 93%) synthetic strategy to fabricate WS 2 nanosheets, which exhibit highly desirable electrocatalytic properties toward both alkaline sulfion (S 2- ) oxidation reaction (SOR) and acidic hydrogen evolution reaction (HER), prompting us to develop a hybrid alkali-acid electrochemical cell with the WS 2 nanosheets as bifunctional electrode catalysts of alkaline anodic SOR and acidic cathodic HER, such proof-of-concept device may hold promise for self-powder or low-electricity electrolytic H 2 generation and environmentally friendly recycling of sulfion with enhancing electron utilization efficiency, and thus potentially steering and stepping forward its technoeconomic feasibility.
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http://dx.doi.org/10.1002/anie.202108992DOI Listing
July 2021

A General Self-Sacrifice Template Strategy to 3D Heteroatom-Doped Macroporous Carbon for High-Performance Potassium-Ion Hybrid Capacitors.

Nanomicro Lett 2021 May 29;13(1):131. Epub 2021 May 29.

CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research On the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, People's Republic of China.

Potassium-ion hybrid capacitors (PIHCs) tactfully combining capacitor-type cathode with battery-type anode have recently attracted increasing attentions due to their advantages of decent energy density, high power density, and low cost; the mismatches of capacity and kinetics between capacitor-type cathode and battery-type anode in PIHCs yet hinder their overall performance output. Herein, based on prediction of density functional theory calculations, we find Se/N co-doped porous carbon is a promising candidate for K storage and thus develop a simple and universal self-sacrifice template method to fabricate Se and N co-doped three-dimensional (3D) macroporous carbon (Se/N-3DMpC), which features favorable properties of connective hierarchical pores, expanded interlayer structure, and rich activity site for boosting pseudocapacitive activity and kinetics toward K storage anode and enhancing capacitance performance for the reversible anion adsorption/desorption cathode. As expected, the as-assembled PIHCs full cell with a working voltage as high as 4.0 V delivers a high energy density of 186 Wh kg and a power output of 8100 W kg as well as excellent long service life. The proof-of-concept PIHCs with excellent performance open a new avenue for the development and application of high-performance hybrid capacitors.
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http://dx.doi.org/10.1007/s40820-021-00659-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8163926PMC
May 2021

Facile Synthesis of P-Doped Carbon Nanosheets as Janus Electrodes of Advanced Potassium-Ion Hybrid Capacitor.

ACS Appl Mater Interfaces 2021 Jun 15;13(25):29511-29521. Epub 2021 Jun 15.

CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China.

Potassium-ion hybrid capacitors (PIHCs) shrewdly integrate the merits of the high energy density of battery-type anode and the high power density of capacitor-type cathode, promising prospects for potential application in a diversity of fields. Here, we report the synthesis of P-doped porous carbon nanosheets (P-PCNs) with favorable features as electrochemical storage materials, including ultrahigh specific surface area and rich activity sites. The P-PCN as Janus electrodes show highly attractive electrochemical properties of high capacity and remarkable stability for fast K storage and manifest high capacitance for PF adsorption. The P-PCNs are applied as both anode and cathode materials to set up dual-carbon PIHCs, which show the capability to deliver a high energy/power density (165.2 Wh kg and 5934.4 W kg) as well as remarkable long-life capability.
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http://dx.doi.org/10.1021/acsami.1c04278DOI Listing
June 2021

Phytoremediation of potentially toxic elements in a polluted industrial soil using Poinsettia.

Physiol Mol Biol Plants 2021 Apr 27;27(4):675-686. Epub 2021 Mar 27.

Central South University of Forestry and Technology, Changsha, China.

Potentially toxic elements (PTEs) pollution has become a serious environmental threat, particularly in developing countries such as China. In response, there is a growing interest in phytoremediation studies to identify plant species as designated hyperaccumulators of PTEs in polluted soils. Poinsettia was selected as a candidate species for phytoremediation of six PTEs (Zn, Pb, Hg, Cr, As, Cu) in this study. A pot cultivation experiment (randomized incomplete block experimental design with 5 treatments and 4 blocks) was conducted using contaminated soils gathered from an industrial area in southcentral China. The bioaccumulation factor (BAF), translocation factor (TF), and bioconcentration factor were analyzed to determine the phytoremediation potential of poinsettia potted in different ratios of polluted soils. One-way ANOVA with post-hoc Tukey's test showed that poinsettia had significant uptake of Zn, Pb, Cu (BAF < 1 and TF < 1,  < 0.05) and Hg (BAF < 1 and TF > 1,  < 0.05). Poinsettias can therefore effectively accumulate Zn, Pb, and Cu in their lateral roots while extracting and transferring Hg into their leaves. Moreover, poinsettia exhibited tolerance towards As and Cr. Interestingly, it was also observed that PTEs can inhibit the height of potted poinsettia at a certain concentration.
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http://dx.doi.org/10.1007/s12298-021-00980-wDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8055735PMC
April 2021
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