Catalysis of ethanol electro oxidation by PtRu: the influence of catalyst composition

被引：161

作者：

Camara, GA ^{[1
]}

de Lima, RB ^{[1
]}

Iwasita, T ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2004年 / 6卷 / 08期

基金：

巴西圣保罗研究基金会;

关键词：

electrocatalysis; ethanol electrooxidation; FTIR; fuel cell; PtRu electrodeposits;

D O I：

10.1016/j.elecom.2004.06.001

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The catalytic activity for ethanol oxidation is studied as a function of the atomic composition of PtRu electrodeposits. Chronoamperometric curves taken at 0.5 V show that the current for ethanol oxidation at PtRu electrodeposits, measured 30 min after the application of a potential step from 0.05 V, increases in the presence of Ru up to a Ru content of about 40%. The highest value observed at 0.5 V vs. RHE was 30 muA/cm(2) at 25 degreesC. There is a relatively narrow range of PtRu compositions that present a high rate of ethanol oxidation. Pure Ru has no activity towards ethanol oxidation at room temperature. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：812 / 815

页数：4

共 16 条

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