Effect of particle size on the activity and durability of the Pt/C electrocatalyst for proton exchange membrane fuel cells

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	Effect of particle size on the activity and durability of the Pt/C electrocatalyst for proton exchange membrane fuel cells
	Z. Xu; H. M. Zhang; H. X. Zhong; Q. H. Lu; Y. F. Wang; D. S. Su
	2012
发表期刊	Applied Catalysis B-Environmental
ISSN	0926-3373
卷号	111 页码:264-270
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.
部门归属	[xu, zhuang; zhang, huamin; zhong, hexiang] chinese acad sci, dalian inst chem phys, div energy storage batteries & technol, dalian 116023, peoples r china. [xu, zhuang] chinese acad sci, grad sch, beijing 100039, peoples r china. [lu, qiuhong; wang, yunfeng; su, dangsheng] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [su, dangsheng] max planck soc, fritz haber inst, d-14195 berlin, germany.;zhang, hm (reprint author), chinese acad sci, dalian inst chem phys, div energy storage batteries & technol, dalian 116023, peoples r china.;zhanghm@dicp.ac.cn
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
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60375
专题	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.