Nano-silicon carbide supported catalysts for PEM fuel cells with high electrochemical stability and improved performance by addition of carbon

被引：84

作者：

Lv, Haifeng ^{[1
]}

Mu, Shichun ^{[1
]}

Cheng, Niancai ^{[1
]}

Pan, Mu ^{[1
]}

机构：

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

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2010年 / 100卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

Silicon carbide; Support; Electrocatalyst; Stability; PEM fuel cell; PLATINUM CATALYSTS; PARTICLE-SIZE; ELECTROCATALYSTS; STABILIZATION; CORROSION; LIFETIME; BEHAVIOR;

D O I：

10.1016/j.apcatb.2010.07.030

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：

Nano-silicon carbide was applied as a novel catalyst support in proton exchange membrane (PEM) fuel cells to improve catalyst stability, due to its excellent resistance to electrochemical oxidation. Homogeneously dispersed Pt nanoparticles were deposited on beta-sic (Pt/SiC) using an ethylene glycol reduction method. Furthermore, carbon was introduced into this Pt/SiC catalyst, (Pt/SiC/C), to improve its electrocatalytic performance by increasing the electrical conductivity. The electrochemical stability of SiC was investigated and showed almost no changes in the redox region after oxidation for 48 h at 1.20V. Based on accelerated durability tests (ADT) and high-resolution transmission electron microscopy (HRTEM), the electrochemical stability of Pt/SiC/C was remarkably enhanced compared with the Pt/C catalysts, which could be attributed to the excellent stability of the SiC support and the addition of high electrical conductivity carbon. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：190 / 196

页数：7

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