Synthesis and application of core-shell Co@Pt/C electrocatalysts for proton exchange membrane fuel cells

被引：53

作者：

Lin, Rui ^{[1
,2
]}

Cao, Chunhui ^{[1
,2
]}

Zhao, Tiantian ^{[1
,2
]}

Huang, Zhen ^{[1
,2
]}

Li, Bing ^{[1
,2
]}

Wieckowski, Andrzej ^{[3
]}

Ma, Jianxin ^{[1
,2
]}

机构：

[1] Tongji Univ, Clean Energy Automot Engn Ctr, Shanghai 201804, Peoples R China

[2] Tongji Univ, Sch Automot Studies, Shanghai 201804, Peoples R China

[3] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

来源：

JOURNAL OF POWER SOURCES | 2013年 / 223卷

基金：

中国国家自然科学基金;

关键词：

Core-shell structure; Co@Pt/C catalyst; Electrochemical performance; Single cell test; Durability; PARTICLE-SIZE; IMPEDANCE SPECTROSCOPY; REDUCTION; CATALYSTS; PERFORMANCE; NI; DURABILITY; CATHODES; FE; CU;

D O I：

10.1016/j.jpowsour.2012.09.073

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Co@Pt/C core-shell catalysts are synthesized by a two-step chemical reduction method followed by the heat treatment in H-2 and N-2 mixture. High Resolution (HR-TEM), EDX (Energy-dispersive X-ray spectroscopy) and in-situ X-ray diffraction (XRD) techniques are used to characterize the nano-structured catalysts. The results show that the core-shell structure of Co@Pt/C is formed and the average particle size is about 3 nm. From the result of the in-situ XRD, it is found that the heat treatment favors for the formation of crystalline structure and the proper particle size of catalyst. The in-situ XRD detection also helps find the optimized heat treatment temperature. The linear sweep voltammetry (LSV) result reveals that the Co@Pt (1:3)/C (reduced) catalyst exhibits the best catalytic activity toward oxygen reduction reaction (ORR). A 130 h life time test for the single cell, in which the membrane electrode assembly (MEA) using Co@Pt (1:3)/C (reduced) as the cathode catalyst, is operated to evaluate the durability. The results of the test show that the formation of the core-shell structure of Co@Pt/C catalyst is favorable to improve the stability and durability. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：190 / 198

页数：9

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