Enhancing CO tolerance of electrocatalysts: Electro-oxidation of CO on WC and Pt-modified WC

被引：37

作者：

Mellinger, Zachary J. ^{[1
]}

Weigert, Erich C. ^{[1
]}

Stottlemyer, Alan L. ^{[1
]}

Chen, Jingguang G. ^{[1
]}

机构：

[1] Univ Delaware, Dept Chem Engn, Ctr Catalyt Sci & Technol, Newark, DE 19716 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2008年 / 11卷 / 05期

关键词：

D O I：

10.1149/1.2844209

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We investigated tungsten monocarbide (WC) and Pt-modified WC as CO-tolerant electrocatalysts as compared to pure Pt. The binding energy of CO, estimated using temperature-programmed desorption, is weaker on WC and Pt/WC than on Pt, suggesting that it should be easier to oxidize CO on WC and Pt/WC. This hypothesis was verified using cyclic voltammetry to compare the electro-oxidation of CO on WC, Pt/WC, and Pt supported on carbon substrates, which showed a lower voltage for the onset of oxidation of CO on WC and Pt/WC than on Pt. (c) 2008 The Electrochemical Society.

引用

页码：B63 / B67

页数：5

共 39 条

[11]

Ganesan R., 2005, ANGEW CHEM, V117, P6715

[12] TUNGSTEN AND TUNGSTEN-CARBON THIN-FILMS DEPOSITED BY MAGNETRON SPUTTERING [J].

GOUYPAILLER, P ;

PAULEAU, Y .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1993, 11 (01) :96-102

[13] BIMETALLIC CARBON SUPPORTED ANODES FOR THE DIRECT METHANOL AIR FUEL-CELL [J].

HAMNETT, A ;

KENNEDY, BJ .

ELECTROCHIMICA ACTA, 1988, 33 (11) :1613-1618

[14] Surface chemistry of transition metal carbides [J].

Hwu, HH ;

Chen, JGG .

CHEMICAL REVIEWS, 2005, 105 (01) :185-212

[15] Potential application of tungsten carbides as electrocatalysts [J].

Hwu, HH ;

Chen, JGG .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 2003, 21 (04) :1488-1493

[16] Potential application of tungsten carbides as electrocatalysts: 4. Reactions of methanol, water, and carbon monoxide over carbide-modified W(110) [J].

Hwu, HH ;

Chen, JG .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (09) :2029-2039

[17] Potential application of tungsten carbides as electrocatalysts.: 2.: Coadsorption of CO and H2O on carbide-modified W(111) [J].

Hwu, HH ;

Polizzotti, BD ;

Chen, JGG .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (41) :10045-10053

[18] BINARY-SYSTEMS OF PLATINUM AND A 2ND METAL AS OXIDATION CATALYSTS FOR METHANOL FUEL-CELLS [J].

JANSSEN, MMP ;

MOOLHUYSEN, J .

ELECTROCHIMICA ACTA, 1976, 21 (11) :869-878

[19] Synthesis and characterization of Pt-WO3 as methanol oxidation catalysts for fuel cells [J].

Jayaraman, S ;

Jaramillo, TF ;

Baeck, SH ;

McFarland, EW .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (48) :22958-22966

[20] Cyclohexene as a chemical probe of the low-temperature hydrogenation activity of Pt/Ni(111) bimetallic surfaces [J].

Khan, NA ;

Zellner, MB ;

Chen, JGG .

SURFACE SCIENCE, 2004, 556 (2-3) :87-100

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