Carbon supported Pt-Pd alloy as an ethanol tolerant oxygen reduction electrocatalyst for direct ethanol fuel cells

被引：138

作者：

Lopes, T. ^{[2
]}

Antolini, E. ^{[1
,2
]}

Gonzalez, E. R. ^{[2
]}

机构：

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

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

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2008年 / 33卷 / 20期

关键词：

Direct ethanol fuel cells (DEFC); Electrocatalyst; Platinum; Palladium; Oxygen reduction;

D O I：

10.1016/j.ijhydene.2008.05.030

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：

A carbon supported Pt-Pd catalyst with a Pt:Pd atomic ratio 77:23 was prepared by reduction of metal precursors with formic acid and characterized by EDX, XRD and XPS techniques. A decrease of the lattice parameter compared with that of pure Pt was observed, indicating the formation of a Pt-Pd alloy. Tests in H2SO4 Solution in the absence of ethanol showed that the Pd-containing is slightly more active than pure Pt for the oxygen reduction reaction (ORR). In the presence of ethanol a larger increase in over-potential of the ORR on pure Pt than that on Pt-Pd was found, indicating a higher ethanol tolerance of the binary catalyst. The enhanced performance at 90 degrees C of the direct ethanol fuel cell with Pt-Pd/C as cathode material confirmed the results of half cell tests, and was essentially ascribed to a reduced ethanol adsorption on Pt-Pd. (c) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：5563 / 5570

页数：8

共 38 条

[1] Ethanol crossover and direct ethanol PEM fuel cell performance modeling and experimental validation [J].

Andreadis, George ;

Tsiakaras, Panagiotis .

CHEMICAL ENGINEERING SCIENCE, 2006, 61 (22) :7497-7508

[2] An overview of platinum-based catalysts as methanol-resistant oxygen reduction materials for direct methanol fuel cells [J].

Antolini, E. ;

Lopes, T. ;

Gonzalez, E. R. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 461 (1-2) :253-262

[3] Effects of geometric and electronic factors on ORR activity of carbon supported Pt-Co electrocatalysts in PEM fuel cells [J].

Antolini, E ;

Salgado, JRC ;

Giz, MJ ;

Gonzalez, ER .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2005, 30 (11) :1213-1220

[4] Electrocatalysis of oxygen reduction on a carbon supported platinum-vanadium alloy in polymer electrolyte fuel cells [J].

Antolini, E ;

Passos, RR ;

Ticianelli, EA .

ELECTROCHIMICA ACTA, 2002, 48 (03) :263-270

[5] Catalysts for direct ethanol fuel cells [J].

Antolini, Ermete .

JOURNAL OF POWER SOURCES, 2007, 170 (01) :1-12

[6] THE STRUCTURE AND ACTIVITY OF PT-CO ALLOYS AS OXYGEN REDUCTION ELECTROCATALYSTS [J].

BEARD, BC ;

ROSS, PN .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1990, 137 (11) :3368-3374

[7] CHARACTERIZATION OF A TITANIUM-PROMOTED SUPPORTED PLATINUM ELECTROCATALYST [J].

BEARD, BC ;

ROSS, PN .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1986, 133 (09) :1839-1845

[8] Ethanol oxidation on carbon supported Pt-Sn electrocatalysts prepared by reduction with formic acid [J].

Colmati, Flavio ;

Antolini, Ermete ;

Gonalez, Ernesto R. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (01) :B39-B47

[9] Electrodes modified by electrodeposition of CoTAA complexes as selective oxygen cathodes in a direct methanol fuel cell [J].

Convert, P ;

Coutanceau, C ;

Crouïgneau, P ;

Gloaguen, F ;

Lamy, C .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 2001, 31 (09) :945-952

[10] Influence of the nanostructure of palladium mesoparticles on the kinetics of molecular oxygen electroreduction [J].

Creus, AH ;

Gimeno, Y ;

Díaz, P ;

Vázquez, L ;

González, S ;

Salvarezza, RC ;

Arvia, AJ .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (30) :10785-10795

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