Effect of Ru addition on the structural characteristics and the electrochemical activity for ethanol oxidation of carbon supported Pt-Sn alloy catalysts

被引：101

作者：

Antolini, Ermete

Colmati, Flavio

Gonzalez, Ernesto R.

机构：

[1] Scuola Sci Mat, I-16016 Genoa, Italy

[2] USP, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2007年 / 9卷 / 03期

关键词：

ethanol; fuel cell; electro-oxidation; Pt-Sn/C; Pt-Sn-Ru/C; electrocatalysts;

D O I：

10.1016/j.elecom.2006.10.012

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Binary Pt-Sn/C (1:1) and ternary Pt-Sn-Ru/C (1:1:0.3 and 1:1:1) catalysts were synthesized by reduction of precursors with formic acid, and their activity for ethanol oxidation was compared with that of commercial Pt/C and Pt-Ru/C catalysts. Linear sweep voltammetry measurements at 40 and 90 degrees C showed that for potentials higher than 0.3 V vs. RHE, the Pt-Sn-Ru/C (1:1:0.3) catalyst presents the highest activity for ethanol electro-oxidation, while the electrochemical activity of the Pt-Sn-Ru/C (1:1:1) catalyst was lower than that of both the binary Pt-Sn/C and Pt-Ru/C catalysts. Tests in a single direct ethanol fuel cell confirmed the superior performance of the Pt-Sn-Ru/C (1:1:0.3) electrocatalyst. The positive effect of the Ru presence in the Pt-Sn-Ru/C (1:1:0.3) catalyst was ascribed to the interactions between Sri and Ru oxides. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：398 / 404

页数：7

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