Journal
ACS CATALYSIS
Volume 2, Issue 11, Pages 2403-2408Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs3005242
Keywords
cobalt; catalysis; ambient pressure XPS; bimetallic; carbon dioxide
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Funding
- Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy [DE-FG02-12ER1635]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1126374] Funding Source: National Science Foundation
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Catalytic conversion of CO2 to CH4 on-cobalt oxide and Ru-doped cobalt oxide nanorods was studied with in-house ambient pressure X-ray photoelectron spectroscopy (AP-XPS) using monochromated Al K alpha. A correlation between catalytic performances of the two catalysts and their surface chemistry under reaction conditions was built. Active phases of the two catalysts are metallic cobalt and bimetallic Co-Ru, respectively. Light-off temperature of Co-Ru catalyst is lower than that of a cobalt catalyst. Selectivity to production of CH4 and activity on the Ru-doped cobalt oxide are obviously enhanced by formation of bimetallic Co-Ru ultrathin film in its surface region in contrast to that of cobalt catalyst in the temperature range of 200-340 degrees C.
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