Selective CO oxidation over Pt/alumina catalysts for fuel cell applications

被引：360

作者：

Manasilp, A ^{[1
]}

Gulari, E ^{[1
]}

机构：

[1] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2002年 / 37卷 / 01期

关键词：

selective oxidation of CO; Pt/alumina catalyst; sol-gel synthesis; fuel processing; fuel cell;

D O I：

10.1016/S0926-3373(01)00319-8

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：

It has been demonstrated that even traces of CO present in the hydrogen rich feed gas to proton exchange membrane (PEM) fuel cells can poison the platinum anode electrode and dramatically reduce the power output. The tolerable level of CO is around 10ppm. In this paper, we present the results of selective CO oxidation in simulated reformate gas over single-step sol-gel prepared Pt/alumina catalysts. The effect of water vapor, carbon dioxide, CO and oxygen concentrations, temperature, and Pt loading on the activity and selectivity are presented. Our results show that a 2% Pt/alumina sol-gel catalyst can selectively oxidize CO down to a few ppm with constant selectivity and high space velocity. Water vapor in the feed increases the activity of the catalysts dramatically and in the absence of water vapor, CO2 in the feed stream decreases the activity of the catalysts significantly. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：17 / 25

页数：9

共 16 条

[1]

BROWN M, Patent No. 3088919

[2]

COHN JGE, 1965, Patent No. 3216783

[3] A compact CO selective oxidation reactor for solid polymer fuel cell powered vehicle application [J].

Dudfield, CD ;

Chen, R ;

Adcock, PL .

JOURNAL OF POWER SOURCES, 2000, 86 (1-2) :214-222

[4]

Gottesfeld S., 1990, US, Patent No. [4,910,099, 4910099]

[5] Binary and ternary anode catalyst formulations including the elements W, Sn and Mo for PEMFCs operated on methanol or reformate gas [J].

Gotz, M ;

Wendt, H .

ELECTROCHIMICA ACTA, 1998, 43 (24) :3637-3644

[6] Co oxidation by silver cobalt composite oxide [J].

Gulari, E ;

Güldür, C ;

Srivannavit, S ;

Osuwan, S .

APPLIED CATALYSIS A-GENERAL, 1999, 182 (01) :147-163

[7] Removal of carbon monoxide from hydrogen-rich fuels by selective oxidation over platinum catalyst supported on zeolite [J].

Igarashi, H ;

Uchida, H ;

Suzuki, M ;

Sasaki, Y ;

Watanabe, M .

APPLIED CATALYSIS A-GENERAL, 1997, 159 (1-2) :159-169

[8]

Inui T., 1993, NEW ASPECTS SPILLOVE, P27

[9] Kinetics of the selective CO oxidation in H-2-rich gas on Pt/Al2O3 [J].

Kahlich, MJ ;

Gasteiger, HA ;

Behm, RJ .

JOURNAL OF CATALYSIS, 1997, 171 (01) :93-105

[10] Selective catalytic oxidation of CO in H2:: Fuel cell applications [J].

Korotkikh, O ;

Farrauto, R .

CATALYSIS TODAY, 2000, 62 (2-3) :249-254

← 1 2 →