Effect of particle size on the activity and durability of the Pt/C electrocatalyst for proton exchange membrane fuel cells
文献类型：期刊论文
| 作者 | Z. Xu ; H. M. Zhang ; H. X. Zhong ; Q. H. Lu ; Y. F. Wang ; D. S. Su |
| 刊名 | Applied Catalysis B-Environmental
 |
| 出版日期 | 2012 |
| 卷号 | 111页码:264-270 |
| 关键词 | Proton exchange membrane fuel cells Pt/C electrocatalyst Particle size Activity Durability platinum crystallite size oxygen reduction reaction supported platinum nanoparticles catalysts kinetics carbon alloy acid degradation |
| ISSN号 | 0926-3373 |
| 中文摘要 | Carbon supported Pt (Pt/C) with various average particle sizes ranging from sub 3 nm to 6.5 nm were in situ prepared and characterized at the cathode of proton exchange membrane fuel cells (PEMFCs). A clear Pt particle size effect on both the catalytic activity for oxygen reduction reaction (ORR) and the durability of the electrocatalyst was revealed. With the Pt particle size increase, both the surface specific activity and the electrochemical stability of Pt/C improved; however, the mass specific activity of Pt/C is balanced by the electrochemical surface area loss. The reduced occupation of corner and edge atoms on the Pt surface during the Pt particle size increase is believed to weaken the adsorption of the oxygenated species on Pt, and thereafter releases more available active sites for ORR and also renders the Pt surface a stronger resistance against potential cycling. It is therefore proposed that by designing the Pt microstructure with more face atoms on the surface, cathode electrocatalyst with both improved activity and enhanced durability would be developed for PEMFCs. (C) 2011 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60375]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Z. Xu,H. M. Zhang,H. X. Zhong,et al. Effect of particle size on the activity and durability of the Pt/C electrocatalyst for proton exchange membrane fuel cells[J]. Applied Catalysis B-Environmental,2012,111:264-270. |
| APA | Z. Xu,H. M. Zhang,H. X. Zhong,Q. H. Lu,Y. F. Wang,&D. S. Su.(2012).Effect of particle size on the activity and durability of the Pt/C electrocatalyst for proton exchange membrane fuel cells.Applied Catalysis B-Environmental,111,264-270. |
| MLA | Z. Xu,et al."Effect of particle size on the activity and durability of the Pt/C electrocatalyst for proton exchange membrane fuel cells".Applied Catalysis B-Environmental 111(2012):264-270. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。