Enhanced activity of PtSn/C anodic electrocatalyst prepared by formic acid reduction for direct ethanol fuel cells

被引：70

作者：

Guo, Yonglang ^{[1
]}

Zheng, Yanzhen ^{[1
]}

Huang, Meihua ^{[1
]}

机构：

[1] Fuzhou Univ, Coll Chem & Chem Engn, Fuzhou 350002, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2008年 / 53卷 / 07期

关键词：

anodic catalyst; direct ethanol fuel cell; ethanol oxidation; formic acid reductant; PtSn/C;

D O I：

10.1016/j.electacta.2007.11.024

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The Pt3Sn/C catalyst with high electrochemical activity was synthesized under optimizing preparation conditions. The surface of carbon support pretreated by strong acid contains many O-H and C=O groups, which will increase the active sites of PtSn/C catalysts. The catalyst structure was characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and temperature programmed reduction (TPR). The co-reduction of Pt4+ and Sn2+ ions causes Sn to enter Pt crystal lattice to form PtSn alloy whose surface, however, contains tin oxides with Sn4+ and Sn2+ valences, which can promote the ethanol oxidation. The crystallinity of PtSn decreases with the reduction of the atomic ratio of Pt:Sn. By prolonging the reaction time of formic acid, the forward anodic peak current of ethanol oxidation reaches 16.2 mA on the Pt3Sn/C catalyst with 0.025 mg Pt loading. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3102 / 3108

页数：7

共 35 条

[1] STATE OF METALLIC PHASE IN PT-SN/AL2O3 CATALYSTS PREPARED BY DIFFERENT DEPOSITION TECHNIQUES [J].

BARONETTI, GT ;

DEMIGUEL, SR ;

SCELZA, OA ;

CASTRO, AA .

APPLIED CATALYSIS, 1986, 24 (1-2) :109-116

[2] Dependence of CH3OH oxidation activity for a wide range of PtRu alloys -: Detailed analysis and new views [J].

Bock, C ;

MacDougall, B ;

LePage, Y .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (08) :A1269-A1278

[3] Preparation, characterization and utilization of a new electrocatalyst for ethanol oxidation obtained by the sol-gel method [J].

Calegaro, M. L. ;

Suffredini, H. B. ;

Machado, S. A. S. ;

Avaca, L. A. .

JOURNAL OF POWER SOURCES, 2006, 156 (02) :300-305

[4] Synthesis, characterization, and catalytic properties of colloidal platinum nanoparticles protected by poly(N-isopropylacrylamide) [J].

Chen, CW ;

Akashi, M .

LANGMUIR, 1997, 13 (24) :6465-6472

[5] Ethanol oxidation on a carbon-supported Pt75Sn25 electrocatalyst prepared by reduction with formic acid:: Effect of thermal treatment [J].

Colmati, Flavio ;

Antolini, Ermete ;

Gonzalez, Emesto R. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2007, 73 (1-2) :106-115

[6] 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

[7] Effect of temperature on the mechanism of ethanol oxidation on carbon supported Pt, PtRu and Pt3Sn electrocatalysts [J].

Colmati, Flavio ;

Antolini, Ermete ;

Gonzalez, Ernesto R. .

JOURNAL OF POWER SOURCES, 2006, 157 (01) :98-103

[8] Extension of preparation methods employed with ceramic materials to carbon honeycomb monoliths [J].

Gatica, JM ;

Rodríguez-Izquierdo, JM ;

Sánchez, D ;

Ania, C ;

Parra, JB ;

Vidal, H .

CARBON, 2004, 42 (15) :3251-3254

[9] The influence of the chlorine content on the bimetallic particle formation in Pt-Re/Al2O3 studied by STEM/EDX, TPR, H2 chemisorption and model reaction studies [J].

Gjervan, T ;

Prestvik, R ;

Totdal, B ;

Lyman, CE ;

Holmen, A .

CATALYSIS TODAY, 2001, 65 (2-4) :163-169

[10] The role of cerium in the oxidation of ethanol over SnO2-supported molybdenum oxides [J].

Gonçalves, FM ;

Medeiros, PRS ;

Appel, LG .

APPLIED CATALYSIS A-GENERAL, 2001, 208 (1-2) :265-270

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