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KMID : 1024520090180101071
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Journal of the Environmental Sciences
2009 Volume.18 No. 10 p.1071 ~ p.1077
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Characterization of Enhanced CO Oxidation Activity by Alumina Supported Platinum Catalyst
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Jo Myung-Chan
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Abstract
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A novel pretreatment technique was applied to the conventional Pt/alumina catalyst to prepare for the highly
efficient catalyst for the preferential oxidation of carbon monoxide in hydrogen-rich condition. Their performance
was investigated by selective CO oxidation reaction. CO conversion with the oxygen-treated Pt/Alumina
catalyst increased remarkably especially at the low temperature below 100℃. This result is promising for the
normal operation of the proton exchange membrane fuel cell (PEMFC) without CO poisoning of the anode
catalyst. XRD analysis results showed that metallic Pt peaks were not observed for the oxygen-treated catalyst.
This implies that well dispersed small Pt particles exist on the catalyst. This result was confirmed by high
resolution transmission electron microscopy (HRTEM) analysis. Consequently, it can be concluded that highly
dispersed Pt nanoparticles could be prepared by the novel pretreatment technique and thus, CO conversion
could be increased considerably especially at the low temperatures below 100℃.
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KEYWORD
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Preferential oxidation of CO, PEMFC, Pt/Alumina catalyst, XRD
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