Synthesis and Characteristics of Pt/graphene by Co-Reduction Method for Oxygen Reduction Reactions

被引：5

作者：

Wang Wan-Li ^{[1
]}

Ma Zi-Feng ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Chem Engn, Shanghai 200240, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 2012年 / 28卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Graphene; Co-reduction method; Electrocatalyst; Oxygen reduction reaction; Proton exchange membrane fuel cell; ELECTROCHEMICAL PERFORMANCE; FUNCTIONALIZED GRAPHENE; CATALYSTS; SHEETS; OXIDATION; CATHODE; FILM;

D O I：

10.3866/PKU.WHXB201209252

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：

40% (w) Pt/graphene composites were prepared by sodium borohydride chemical co-reduction, and were subsequently used as an electrocatalyst for oxygen reduction reactions. The electrocatalytic activity and stability was evaluated by cyclic voltammetry. The results indicated that the initial activity of Pt/graphene was lower than that of Pt/C due to the oxygen diffusion inhibition; however, the Pt/graphene showed superior durability characteristics. Degradation tests showed a 50% degradation of Pt/graphene, which was substantially less than that of Pt/C (79%). X-ray diffraction and transmission electron microscope results showed that the composite formed strong interactions between the platinum nanoparticles and the graphene supports. The graphene supports may also prevent the graphene sheets from folding or re-stacking, which would hinder platinum nanoparticles' aggregation. The performance of a single cell was also tested, confirming an improvement in durability.

引用

页码：2879 / 2884

页数：6

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