Investigation of unsupported Pt-Ru catalysts for high temperature methanol electro-oxidation

被引：40

作者：

Aricò, AS

Monforte, G

Modica, E

Antonucci, PL

Antonucci, V

机构：

[1] CNR, TAE Inst Transformat & Storage Energy, I-98126 Messina, Italy

[2] Univ Reggio Calabria, Dept Mat & Mech, I-89100 Reggio Di Calabria, Italy

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2000年 / 2卷 / 07期

关键词：

Pt-Ru catalysts; X-ray diffraction; X-ray photoelectron spectroscopy; methanol electro-oxidation; fuel cells;

D O I：

10.1016/S1388-2481(00)00063-1

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Two unsupported Pt-Ru catalysts, varying in the nature and content of RuOx species, were investigated for methanol electro-oxidation in a solid polymer electrolyte fuel cell at high temperature. The catalyst containing a lower amount of ruthenium oxide showed higher catalytic activity and lower mass transport limitations. A physicochemical investigation was carried out to support the interpretation of electrochemical results. Pt-Ru alloy appears more active than Pt-RuOx in the chemisorption of labile-bonded oxygenated species, which promote the oxidation of the methanolic residues adsorbed on the catalyst surface. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：466 / 470

页数：5

共 40 条

[1] Aricò AS, 1998, ELECTROCHEM SOLID ST, V1, P66, DOI 10.1149/1.1390638
[2] Arico AS, 1996, J APPL ELECTROCHEM, V26, P959, DOI 10.1007/BF00242049
[3] Analysis of the electrochemical characteristics of a direct methanol fuel cell based on a Pt-Ru/C anode catalyst
Arico, AS
Creti, P
Kim, H
Mantegna, R
Giordano, N
Antonucci, V
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (12) : 3950 - 3959
[4] Effect of carbon-supported and unsupported Pt–Ru anodes on the performance of solid-polymer-electrolyte direct methanol fuel cells
A.S. Aricò
A.K. Shukla
K.M. El-Khatib
P. Cretì
V. Antonucci
[J]. Journal of Applied Electrochemistry, 1999, 29 (6) : 673 - 678
[5] ARICO AS, 1992, 181 M EL SOC ST LOUI
[6] BALDAUF M, 1998, S EL EN CONV STOR MO
[7] Bonnemann H., 1991, ANGEW CHEM, V103, P1344
[8] Briggs D., 1983, Practical Surface Analysis by Auger and X-ray Photoelectron Spectroscopy
[9] BUCKLEY AN, 1991, J ELECTROANAL CHEM, V302, P261
[10] Characterization of platinum-rutheniun electrodeposits using XRD, AES and XPS analysis
Cattaneo, C
de Pinto, MIS
Mishima, H
de Mishima, BAL
Lescano, D
Cornaglia, L
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1999, 461 (1-2): : 32 - 39

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