Preparation and surface characterization of Pt-Au/C cathode catalysts with ceria modification for oxygen reduction reaction

被引：25

作者：

Liu, Chen-Wei ^{[1
]}

Wei, Yu-Chen ^{[1
]}

Wang, Kuan-Wen ^{[1
]}

机构：

[1] Natl Cent Univ, Inst Mat Sci & Engn, Tao Yuan 32001, Taiwan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 07期

关键词：

Pt-Au catalysts; CeO2; Oxygen reduction reaction (ORR); Temperature-programmed reduction (TPR); Oxophilicity; TEMPERATURE-PROGRAMMED REDUCTION; PLATINUM-RUTHENIUM CATALYST; ELECTROCATALYSTS; METHANOL; CO; PROMOTION; ALLOYS; ANODE;

D O I：

10.1016/j.elecom.2009.05.009

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Alloy catalysts Of Pt50Au50/CexC with various Ce additions (x) were prepared for the oxygen reduction reaction (ORR). The characterization of the alloy structures, surface species, and electro-catalytic activities of prepared alloy catalysts were performed by XRD, temperature-programmed reduction (TPR), and rotating disc electrode (RDE) technique, respectively. The ORR activity of Pt50Au50/C alloy catalyst with a promotion of 15% CeO2 was enhanced significantly in comparison to the commercial Pt/C catalyst within the mixed kinetic-diffusion control region. The addition of CeO2 decreased the particle sizes, increased the dispersion and enhanced the surface segregation of Pt which resulting in an alloy surface with a moderate oxophilicity on alloy catalysts. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：1362 / 1364

页数：3

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