Carbon supported Pt-Cr alloys as oxygen-reduction catalysts for direct methanol fuel cells

被引：84

作者：

Antolini, E

Salgado, JRC

Santos, LGRA

Garcia, G

Ticianelli, EA

Pastor, E

Gonzalez, ER

机构：

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

[2] Univ La Laguna, Dept Quim Fis, San Cristobal la Laguna 38071, Spain

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2006年 / 36卷 / 03期

基金：

巴西圣保罗研究基金会;

关键词：

electrocatalysis; methanol tolerance; oxygen reduction; PEM fuel cell; Pt-Cr alloy;

D O I：

10.1007/s10800-005-9072-0

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrocatalytic activities of various carbon-supported platinum-chromium alloy electrocatalysts towards oxygen reduction in 1 mol l(-1) H2SO4 and in 1 mol l(-1) H2SO4/1-3 mol l(-1) CH3OH, were investigated by means of rotating disc electrode experiments and in solid polymer electrolyte direct methanol fuel cells. The activity of these electrocatalysts for methanol oxidation was evaluated using cyclic voltammetry. It was found that Pt9Cr/C prepared by reduction with NaBH4 exhibits the lowest activity for methanol oxidation and the highest activity for oxygen reduction in the presence of methanol, in comparison to commercial Pt/C, Pt3Cr/C and PtCr/C electrocatalysts.

引用

页码：355 / 362

页数：8

共 30 条

[1] The degree and effect of methanol crossover in the direct methanol fuel cell [J].