Blocking the defect sites on ultrathin Pt nanowires with Rh atoms to optimize the reaction path toward alcohol fuel oxidation
文献类型：期刊论文
| 作者 | Zhao, Xiaoyu; Zhao, Huachao; Sun, Jiefang; Li, Gang; Liu, Rui |
| 刊名 | CHINESE CHEMICAL LETTERS
 |
| 出版日期 | 2020-07 |
| 卷号 | 31期号:7页码:1782-1786 |
| 关键词 | Nanowire catalyst Ethanol electrooxidation In situ FTIR Defect regulation Fuel cells |
| ISSN号 | 1001-8417 |
| 英文摘要 | Anodic electrocatalyst plays the core role in direct alcohol fuel cells (DAFCs), while traditional Pt-catalysts suffer from limited catalytic activity, high over potential and severe CO poisoning. Herein, by selectively depositing Rh atoms on the defective-sites of Pt nanowires (NWs), we developed a new Pt@Rh NW electrocatalyst that exhibited enhanced electrocatalytic performance for both methanol oxidation (MOR) and ethanol oxidation (EOR). Both cyclic voltammetry (CV) and in-situ infrared spectroscopy revealed that the presence of Rh atoms suppressed the generation of poisonous intermediates and completely oxidized alcohols molecule into CO2. Atomic resolusion spherical aberration corrected high-angle annular dark field scanning transmission electron microscopy (CS-HAADF-STEM) and energy-dispersive X-ray spectroscopy (EDS) mapping analysis revealed that Rh atoms were primarily deposited on the defective sites of Pt NWs. Meanwhile, the presence of Rh atoms also modified the electronic state of Pt atoms and therefore lowered the onset potential for alcohols oxidation potential. This work gives the first clear clue on the role of the defective sites of Pt nanocatalyst poisoning, and propose that selectively blocking these sites with trace amount of Rh is an effective strategy in designing advantageous electrocatalysts. (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44625]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhao, Xiaoyu,Zhao, Huachao,Sun, Jiefang,et al. Blocking the defect sites on ultrathin Pt nanowires with Rh atoms to optimize the reaction path toward alcohol fuel oxidation[J]. CHINESE CHEMICAL LETTERS,2020,31(7):1782-1786. |
| APA | Zhao, Xiaoyu,Zhao, Huachao,Sun, Jiefang,Li, Gang,&Liu, Rui.(2020).Blocking the defect sites on ultrathin Pt nanowires with Rh atoms to optimize the reaction path toward alcohol fuel oxidation.CHINESE CHEMICAL LETTERS,31(7),1782-1786. |
| MLA | Zhao, Xiaoyu,et al."Blocking the defect sites on ultrathin Pt nanowires with Rh atoms to optimize the reaction path toward alcohol fuel oxidation".CHINESE CHEMICAL LETTERS 31.7(2020):1782-1786. |
入库方式： OAI收割
来源：生态环境研究中心
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