Pd5Cu4Pt oxygen reduction nanocatalyst for PEM fuel cells

被引：14

作者：

Martinez-Casillas, D. C. ^{[1
]}

Calderon, H. A. ^{[2
]}

Collins-Martinez, V. ^{[3
]}

Solorza-Feria, O. ^{[1
]}

机构：

[1] CINVESTAV IPN, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07360, DF, Mexico

[2] UPALM, ESFM IPN, Dept Fis, Mexico City, DF, Mexico

[3] Ctr Invest Mat Avanzados, Chihuahua 31109, Mexico

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 28期

关键词：

Oxygen reduction reaction; Pd5Cu4Pt; Nanocatalyst; Electrocatalyst synthesis; PEMFC cathode; SHELL ELECTROCATALYSTS; NANOPARTICLES; CATALYSTS;

D O I：

10.1016/j.ijhydene.2012.11.066

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：

Carbon dispersed Pd5Cu4Pt nanocatalyst synthesized by chemical reduction with NaBH4 for the oxygen reduction reaction (ORR) in acid media is investigated. Nanocatalyst is physically characterized by transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (DRX). Results demonstrate the formation of conglomerate nanometric particles ranging from 2 to 10 nm in size. Electrochemical activity is demonstrated by cyclic voltammetry (CV) and rotating disk electrode (RDE) techniques. The results show that the onset potential for the ORR on Pd5Cu4Pt is shifted by ca. 50 mV to more positive values and enhanced catalytic current densities are observed in comparison to carbon dispersed PdCu and Pd catalysts. The Pd5Cu4Pt tested as cathode electrode in a membrane-electrode assembly (MEA) shows a power density of 330 mW cm(-2) at 0.5 V and 80 degrees C, resulting an attractive low Pt content cathode nanocatalyst for PEM fuel cells. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：12674 / 12680

页数：7

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