Promotion of Pt/γ-Al2O3 by Ce for preferential oxidation of CO in H2

Hydrogen for fuel cells can be produced by reforming hydrocarbons. The H2-rich reformate typically contains about 1 mol% CO which will poison the anode of polymer electrolyte fuel cells. The CO concentration can be reduced by preferential oxidation (PROX) using near-stoichiometric amounts of O2. The...

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Bibliographic Details
Published in:Catalysis letters 2001-10, Vol.76 (3-4), p.151-154
Main Authors: IN HYUK SON, LANE, Alan M
Format: Article
Language:English
Subjects:
Aluminum oxide
Carbon monoxide
Catalysis
Catalysts
Catalytic oxidation
Catalytic reactions
Chemistry
Conversion
Electrolytic cells
Exact sciences and technology
Fuel cells
General and physical chemistry
Oxidation
Promotion
Proton exchange membrane fuel cells
Reforming
Selectivity
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Transitional aluminas
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Summary:Hydrogen for fuel cells can be produced by reforming hydrocarbons. The H2-rich reformate typically contains about 1 mol% CO which will poison the anode of polymer electrolyte fuel cells. The CO concentration can be reduced by preferential oxidation (PROX) using near-stoichiometric amounts of O2. The conversion of CO should be over 99% while minimizing oxidation of H2. Supported Pt catalysts with and without promotion by Ce were compared for the catalytic oxidation of CO by O2 in a H2 stream. With unsupported Pt catalysts, selectivity (to CO2 as opposed to H2O) was highest at low temperatures and low O2/CO ratios, however conversion was low. Addition of Ce significantly improved CO conversion under these conditions.
ISSN:1011-372X
1572-879X
DOI:10.1023/A:1012293311973