Thickness effects of a carbon-supported platinum catalyst layer on the electrochemical reduction of oxygen in sulfuric acid solution
文献类型：期刊论文
| 作者 | Jiang, JH; Yi, BL |
| 刊名 | journal of electroanalytical chemistry
 |
| 出版日期 | 2005-03-15 |
| 卷号 | 577期号:1页码:107-115 |
| 关键词 | oxygen reduction catalyst layer thickness fuel cell film electrode spillover |
| 英文摘要 | the influence of the thickness of a carbon-supported platinum catalyst layer on the oxygen reduction reaction (orr) has been studied in sulfuric acid solution by means of a thin-film rotating disk electrode. pronounced changes in the pt utilization, electrode activity and the orr kinetics have been observed upon varying the catalyst layer thickness. the thicker film electrode exhibits a higher pt utilization efficiency and higher activity, and promotes the orr kinetics at potentials relevant to fuel cell operations. the participation of pt surfaces not in contact with the electrolyte solution in electrochemical reactions via the spillover of adsorbed hydrogen and oxygen species, is proposed to be responsible for the changes. the thicker catalyst layer is likely to modify the pt particle-particle distance by providing shared pt sites between adjacent carbon supports, to improve the surface density of active catalyst particles per single carbon support by sharing adjacent catalyst sites, and to increase the ratio of the particle surfaces free of blocking anions to the catalyst/electrolyte interface surfaces. the carbon-supported platinum catalyst layer becomes active at 0.90 v vs rhe only when the catalyst layer is thicker than i pm. to provide reasonable activity, the minimum catalyst layer thickness should be around 2-4 mu m. these results should be considered in the design of the cathode catalyst layer of polymer electrolyte membrane fuel cells. (c) 2004 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, analytical ; electrochemistry |
| 研究领域[WOS] | chemistry ; electrochemistry |
| 关键词[WOS] | thin-film ; hydrogen spillover ; surface-diffusion ; disk electrode ; kinetics ; adsorption ; area ; microelectrodes ; interface ; membranes |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000227735800014 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/139899]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell R&D Ctr, Dalian 116023, Peoples R China 2.NuVant Syst Inc, Chicago, IL 60616 USA |
| 推荐引用方式 GB/T 7714 | Jiang, JH,Yi, BL. Thickness effects of a carbon-supported platinum catalyst layer on the electrochemical reduction of oxygen in sulfuric acid solution[J]. journal of electroanalytical chemistry,2005,577(1):107-115. |
| APA | Jiang, JH,&Yi, BL.(2005).Thickness effects of a carbon-supported platinum catalyst layer on the electrochemical reduction of oxygen in sulfuric acid solution.journal of electroanalytical chemistry,577(1),107-115. |
| MLA | Jiang, JH,et al."Thickness effects of a carbon-supported platinum catalyst layer on the electrochemical reduction of oxygen in sulfuric acid solution".journal of electroanalytical chemistry 577.1(2005):107-115. |
入库方式： OAI收割
来源：大连化学物理研究所
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