Abstract
Pt2+ ion dispersed in CeO2, Ce1−x Ti x O2−δ and TiO2 have been tested for preferential oxidation of carbon monoxide (PROX) in hydrogen rich stream. It is found that Pt2+ substituted CeO2 and Ce1−x Ti x O2−δ in the form of solid solution Ce0.98Pt0.02O2−δ and Ce0.83Ti0.15Pt0.02O2−δ are highly CO selective low temperature PROX catalysts in hydrogen rich stream. Just 15% of Ti substitution in CeO2 improves the overall PROX activity. PROX reaction over Ce0.78Ti0.20Pt0.02O2−δ catalyst
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