Oxygen Reduction Studies on Carbon-supported Pt-M Catalysts (M: Ru, W, Mo)

被引：1
|
作者：
Hernandez Maya, R. [1 ]
Armenta Gonzalez, A. J. [1 ,2 ,3 ]
Ugalde, O. [1 ]
Oropeza Guzman, M. T. [2 ]
Roquero, P. [1 ]
机构：
[1] Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico
[2] Ctr Grad & Invest, Inst Tecnol Tijuana, Tijuana 22000, Baja California, Mexico
[3] Ctr Invest & Desarrollo Tecnol Electroquim AC, Queretaro 76703, Mexico
来源：
JOURNAL OF NEW MATERIALS FOR ELECTROCHEMICAL SYSTEMS | 2012年 / 15卷 / 03期
关键词：
Oxygen reduction reaction; fuel cell catalyst; platinum; ruthenium; tungsten; molybdenum; THIN-FILM; METHANOL; NANOPARTICLES; CATHODE; MOLYBDENUM; TUNGSTEN; OXIDE;
D O I：
10.14447/jnmes.v15i3.57
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The activities of a series of carbon-supported bimetallic catalysts, with different active phases loadings, were tested towards the oxygen reduction reaction (ORR). Pt was used in all materials and its loading was kept constant. Mo, Wand Ru were used as promoting phases. Rotating Disk electrode experiments revealed that Pt-Ru displayed the best performance in oxygen reduction among the studied materials. The materials with the highest loadings of the second metal revealed the highest activities. X-Ray Diffiaction studies (XRD) and Transmission Electron Microscopy (TEM) revealed the presence of homogeneously dispersed metallic ruthenium and different tungsten or molybdenum oxides in the corresponding catalysts. No evidence of alloying was found, and thus the catalytic performances appear to be related to the distribution and interaction of the active phases.
引用
收藏
页码：137 / 143
页数：7
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