Morphology of carbon supported Pt-Ru electrocatalyst and the CO tolerance of anodes for PEM fuel cells

被引：59

作者：

Lin, SD

Hsiao, TC

Chang, JR

Lin, AS ^{[1
]}

机构：

[1] Ind Technol Res Inst, Energy & Resource Labs, Hsinchu, Taiwan

[2] Natl Chung Cheng Univ, Dept Chem Engn, Chiayi, Taiwan

[3] Yuan Ze Univ, Dept Chem Engn, Chungli, Taiwan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 01期

关键词：

D O I：

10.1021/jp982296p

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：

Two Pt-Ru/C catalysts, a commercial 20% Pt-10% Ru/C and a 10% Pt-5% Ru/C synthesized in house (YZU catalyst), were examined for the CO tolerance in polymer-electrolyte-membrane fuel cells (PEFCs). Both half-cell tests under 250 ppm of CO/H-2 and single-cell tests under 100 ppm of CO/H2 showed that the YZU catalyst had smaller increase in the overvoltage at a given current. The platinum-ruthenium microstructures of these two electrocatalysts in the fabricated electrodes were characterized by X-ray absorption spectroscopy (EXAFS). EXAFS indicated that there was no Pt-Ru metal-metal interaction in the commercial catalyst; instead, only ruthenium oxide signals were observed. On the other hand, the YZU catalyst contains a Pt-Ru bimetallic interaction as indicated by the X-ray absorption spectra. It was considered that the Pt-Ru alloy structure has better CO tolerance than nonalloy Pt-Ru structure.

引用

页码：97 / 103

页数：7

共 34 条

[1] AMPHLETT JC, 1995, P 1 INT S NEW MAT FU, P249
[2] BETT J, 1973, J CATAL, V28, P160
[3] CAMPBELL S, 1997, 1997 JOINT INT M ECS, P87
[4] CHEN KY, 1991, J ELECTROCHEM SOC, V38, P2278
[5] COOPER SJ, 1997, P 2 INT S NEW MAT FU
[6] Necessity of CO-free Pt sites for the electrooxidation at low potentials of dissolved CO on polycrystalline Pt
Couto, A
Perez, MC
Rincon, A
Gutierrez, C
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (50) : 19538 - 19544
[7] THE COADSORPTION OF POTASSIUM AND CO ON THE PT(111) CRYSTAL-SURFACE - A TDS, HREELS AND UPS STUDY
CROWELL, JE
GARFUNKEL, EL
SOMORJAI, GA
[J]. SURFACE SCIENCE, 1982, 121 (02) : 303 - 320
[8] ELECTROCHEMICAL OXIDATION OF ADSORBED CARBON-MONOXIDE ON PLATINUM SPHERICAL SINGLE-CRYSTALS - EFFECT OF ANION ADSORPTION
DEBECDELIEVRE, AM
DEBECDELIEVRE, J
CLAVILIER, J
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1990, 294 (1-2): : 97 - 110
[9] NATURE OF CO ADSORPTION DURING H-2 OXIDATION IN RELATION TO MODELING FOR CO POISONING OF A FUEL-CELL ANODE
DHAR, HP
CHRISTNER, LG
KUSH, AK
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1987, 134 (12) : 3021 - 3026
[10] The role of surface oxides in the electrooxidation of methanol, formic acid and CO on Pt, Ru and codeposited Pt-Ru
Frelink, T
Visscher, W
Cox, AP
vanVeen, JAR
[J]. BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1996, 100 (05): : 599 - 606

← 1 2 3 4 →