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

被引：103
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
收藏
页码：398 / 404
页数：7
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