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Self-Supported Nanoporous Au3Cu Electrode with Enriched Gold on Surface for Efficient Electrochemical Reduction of CO2
Ma, XM; Shen, YL; Yao, S; Shu, M; Si, R; An, CH
2020
Source PublicationCHEMISTRY-A EUROPEAN JOURNAL
ISSN0947-6539
Volume26Issue:18Pages:4143-4149
Subtype期刊论文
AbstractThe key to the electrochemical conversion of CO2 lies in the development of efficient electrocatalysts with ease of operation, good conductivity, and rich active sites that fulfil the desired reaction direction and selectivity. Herein, an oxidative etching of Au20Cu80 alloy is used for the synthesis of a nanoporous Au3Cu alloy, representing a facile strategy for tuning the surface electronic properties and altering the adsorption behavior of the intermediates. HRTEM, XPS, and EXAFS results reveal that the curved surface of the synthesized nanoporous Au3Cu is rich in gold with unsaturated coordination conditions. It can be used directly as a self-supported electrode for CO2 reduction, and exhibits high Faradaic efficiency (FE) of 98.12 % toward CO at a potential of -0.7 V versus the reversible hydrogen electrode (RHE). The FE is 1.47 times that over the as-made single nanoporous Au. Density functional theory reveals that *CO has a relatively long distance on the surface of nanoporous Au3Cu, making desorption of CO easier and avoiding CO poisoning. The Hirshfeld charge distribution shows that the Au atoms have a negative charge and the Cu atoms exhibit a positive charge, which separately bond to the C atom and O atom in the *COOH intermediate through a bidentate mode. This affords the lowest *COOH adsorption free energy and low desorption energy for CO molecules.
KeywordOXYGEN REDUCTION CARBON-DIOXIDE ELECTROREDUCTION ETHANOL ELECTROCATALYST NANOPARTICLES SELECTIVITY CATALYST
DOI10.1002/chem.201904619
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/33129
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Tianjin Univ Technol, Sch Chem & Chem Engn, Tianjin Key Lab Organ Solar Cells & Photochem Con, Tianjin 300384, Peoples R China
2.Tianjin Univ Technol, Tianjin Key Lab Adv Funct Porous Mat, Inst New Energy Mat & Low Carbon Technol, Tianjin 300384, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
Recommended Citation
GB/T 7714
Ma, XM,Shen, YL,Yao, S,et al. Self-Supported Nanoporous Au3Cu Electrode with Enriched Gold on Surface for Efficient Electrochemical Reduction of CO2[J]. CHEMISTRY-A EUROPEAN JOURNAL,2020,26(18):4143-4149.
APA Ma, XM,Shen, YL,Yao, S,Shu, M,Si, R,&An, CH.(2020).Self-Supported Nanoporous Au3Cu Electrode with Enriched Gold on Surface for Efficient Electrochemical Reduction of CO2.CHEMISTRY-A EUROPEAN JOURNAL,26(18),4143-4149.
MLA Ma, XM,et al."Self-Supported Nanoporous Au3Cu Electrode with Enriched Gold on Surface for Efficient Electrochemical Reduction of CO2".CHEMISTRY-A EUROPEAN JOURNAL 26.18(2020):4143-4149.
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