Porous graphene supported Pt catalysts for proton exchange membrane fuel cells

被引：61

作者：

Cheng, Kun ^{[1
]}

He, Daping ^{[1
]}

Peng, Tao ^{[1
]}

Lv, Haifeng ^{[1
]}

Pan, Mu ^{[1
]}

Mu, Shichun ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2014年 / 132卷

基金：

中国国家自然科学基金;

关键词：

PEM fuel cell; Catalyst; Electrode; Pore; Graphene; X-RAY PHOTOELECTRON; REDUCTION; COMPOSITE; WATER;

D O I：

10.1016/j.electacta.2014.03.181

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Graphene nanosheet (GNS) has a remarkably high ratio of surface area to thickness and intense inter-sheet aggregation, which heavily resist mass diffusion in vertical orientation. Here, we establish a fast-speed mass diffusion passage by creating pores in GNS, and the corresponding Pt catalyst (Pt/rPGO) displays 15.5 times mass diffusion rate than that of the pristine GNS supported Pt catalyst (Pt/rGO). Thus, the Pt/rPGO catalyst exhibits 1.5 times increase in Pt mass activity toward oxygen reduction reaction compared with the Pt/rGO. Significantly, after H-2 thermal treatment, the mass activity of the Pt/rPGO further increases to 1.9 times that of the Pt/rGO, and its electrochemical stability is also greatly improved. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：356 / 363

页数：8

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