Oxygen reduction on carbon supported Pt-W electrocatalysts

被引：19
作者：
Meza, D. [1 ]
Morales, U. [1 ]
Roquero, P. [2 ]
Salgado, L. [1 ]
机构：
[1] Univ Autonoma Metropolitana, Unidad Iztapalapa, Dept Quim, Area Electroquim, Col Vicentina 09340, DF, Mexico
[2] Univ Nacl Autonoma Mexico, Fac Quim, Unidad Invest Catalisis, Mexico City 04510, DF, Mexico
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 21期
关键词：
Tungsten; Platinum; Oxygen reduction; METHANOL ELECTROOXIDATION; TUNGSTEN CARBIDE; SULFURIC-ACID; PLATINUM; OXIDATION; CATALYST; ELECTRODES;
D O I：
10.1016/j.ijhydene.2009.07.021
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：
The catalytic activity of Pt-W electrocatalysts towards oxygen reduction reaction (ORR) was studied. Pt-W/C materials were prepared by thermolysis of tungsten and platinum carbonyl complexes in 1-2 dichloro-benzene during 48 h. The precursors were mixed to obtain relations of Pt:W: 50:50 and 80:20%w, respectively. The Pt carbonyl complex was previously synthesized by bubbling CO in a chloroplatinic acid solution. The synthesized materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), cyclic voltammetry (CV) and a rotating disk electrode (RDE). The results show that both materials (Pt50W50/C and Pt80W20/C) have a crystalline phase associated with metallic platinum and an amorphous phase related with tungsten and carbon. The particle size of the electrocatalysts depends on the relationship between platinum and tungsten. Finally, both materials exhibit catalytic activity for oxygen reduction. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
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页码：12111 / 12114
页数：4
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