Electrochemical characterization of Pt-CeO2/C and Pt-CexZr1-xO2/C catalysts for ethanol electro-oxidation

被引：88
|
作者：
Bai, Yuxia
Wu, Jianjun
Qiu, Xinping [1 ]
Xi, Jingyu
Wang, Jianshe
Li, Jinfeng
Zhu, Wentao
Chen, Liquan
机构：
[1] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China
[2] Shijiazhuang Coll, Dept Chem, Shijiazhuang 05081, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2007年 / 73卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
ethanol electro-oxidation; electrocatalyst; CexZr1-xO2; Pt-CexZr1-xO2/C; direct ethanol fuel cells;
D O I：
10.1016/j.apcatb.2006.06.026
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：
Pt-CeO2/C and a series of Pt-CeZr1-xO2/C catalyst powders with different Ce/Zr ratio were prepared and evaluated in terms of the electrochemical activity for ethanol electro-oxidation using cyclic voltammetry (CV), steady state polarization experiments and CO-stripping technique at room temperature. XRD results show that CexZr1-xO2 and Pt coexist in the Pt-CexZr(1-x)O(2)/C catalyst and CexZr1-xO2 has no effect on the crystalline lattice of Pt. TEM results show that the Pt and CexZr1-xO2 particles dispersed uniformly over the surface of the carbon black. Cyclic voltammetry results show that the mass activity and specific activity of Pt-CeO2/C for ethanol electro-oxidation is higher than that of Pt/C. The structure and Ce/Zr ratio of Pt-CexZr1-xO2/C has effect on the catalytic activity of catalysts. CO-stripping voltammetry showed that the inclusion of CeO2 and CexZr1-xO2 favors the CO oxidation at lower potential. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：144 / 149
页数：6
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