Ternary PtSnRh-SnO2 nanoclusters: synthesis and electroactivity for ethanol oxidation fuel cell reaction

被引：55

作者：

Du, Wenxin ^{[1
]}

Wang, Qi ^{[2
]}

LaScala, Carlo A. ^{[1
]}

Zhang, Lihua ^{[3
]}

Su, Dong ^{[3
]}

Frenkel, Anatoly I. ^{[4
]}

Mathur, Virendra K. ^{[1
]}

Teng, Xiaowei ^{[1
]}

机构：

[1] Univ New Hampshire, Dept Chem Engn, Durham, NH 03824 USA

[2] Univ Delaware, Dept Chem Engn, Newark, DE 19716 USA

[3] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[4] Yeshiva Univ, Dept Phys, New York, NY 10016 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 24期

关键词：

OXYGEN-REDUCTION; ELECTROCATALYTIC PROPERTIES; INTERMETALLIC COMPOUNDS; OXIDIZING ETHANOL; GOLD CLUSTERS; CATALYSTS; PTPB; NANOPARTICLES; NANOWIRES; ALLOYS;

D O I：

10.1039/c0jm04358c

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 supported ternary Pt52Sn(36-x)Rh12-SnxO2x electrocatalysts with the average diameter of 2.8 +/- 0.5 nm were synthesized using a Polyol process followed by thermal treatment. Several techniques including high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS) were used to identify the coexistence of homogeneously distributed Pt/Sn/Rh random alloy and non-alloyed SnO2 throughout the catalyst. The Pt52Sn(36-x)Rh12-SnxO2x catalyst showed a superior long-term activity and stability towards ethanol oxidation than the commercial Pt catalyst. Our data of ternary Pt/Sn/Rh catalysts with different chemical compositions and crystalline structures also indicated that the superior performance of Pt52Sn(36-x)Rh12-SnxO2x might result from the electronic effect of the Pt/Sn/Rh random alloy.

引用

页码：8887 / 8892

页数：6

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