Journal
ACS CATALYSIS
Volume 4, Issue 7, Pages 2113-2117Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs500501u
Keywords
cluster; preferential oxidation; CO; Pt; iron oxide
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Funding
- National Nature Science Foundation of China [21173218, 21277140, 21303184]
- Arizona State University
- College of Liberal Arts and Sciences of Arizona State University
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Pt single atoms and small clusters were dispersed on iron oxides by a facile coprecipitation method. These catalysts, with or without calcination at elevated temperatures, show excellent activity and selectivity for preferential oxidation of CO in the H-2-rich gas. They can completely remove CO from H-2-rich gas at a wide temperature range of 20-70 degrees C, which renders them suitable for low-temperature applications. The reaction followed a mixture of competitive mechanism and a noncompetitive/redox mechanism. The weakened CO adsorption on small Pt clusters and atoms makes the competitive adsorption of O-2 feasible, which ensures a high activity of Pt/Fe catalysts, even calcined at elevated temperature.
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