Self-Supported Nanoporous Au3Cu Electrode with Enriched Gold on Surface for Efficient Electrochemical Reduction of CO2
文献类型：期刊论文
| 作者 | Ma, XM; Shen, YL; Yao, S; Shu, M; Si, R; An, CH |
| 刊名 | CHEMISTRY-A EUROPEAN JOURNAL
 |
| 出版日期 | 2020 |
| 卷号 | 26期号:18页码:4143-4149 |
| ISSN号 | 0947-6539 |
| 关键词 | OXYGEN REDUCTION CARBON-DIOXIDE ELECTROREDUCTION ETHANOL ELECTROCATALYST NANOPARTICLES SELECTIVITY CATALYST |
| DOI | 10.1002/chem.201904619 |
| 文献子类 | 期刊论文 |
| 英文摘要 | The 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. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33129]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Tianjin Univ Technol, Sch Chem & Chem Engn, Tianjin Key Lab Organ Solar Cells & Photochem Con, Tianjin 300384, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China 3.Tianjin Univ Technol, Tianjin Key Lab Adv Funct Porous Mat, Inst New Energy Mat & Low Carbon Technol, Tianjin 300384, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：上海应用物理研究所
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