Journal
ACS CATALYSIS
Volume 8, Issue 6, Pages 5374-5381Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.8b00541
Keywords
oxidative dehydrogenation; ethane; carbon dioxide; oxygen-modified molybdenum carbide; pulse reactor experiment
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Funding
- US Department of Energy Office of Science [DE-SC0012704]
- U.S. Department of Energy [DE-AC02-980-110886]
- Brookhaven National Laboratory Directed Research and Development (LDRD) Project [16-045]
- U.S. DOE Office of Science [DE-AC02-05CH11231]
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The surface properties that determine the selectivity of Mo2C catalysts in ethane oxidative dehydrogenation with CO2 as a soft oxidant were investigated using a combination of pulse experiments and in-situ spectroscopic methods. Oxygen modification was discovered to be crucial for inhibiting the cleavage of the C-C bond in ethane and enhancing the production of ethylene. The addition of the Fe promoter accelerated the formation of surface oxygen species and stabilized them from reduction by ethane, leading to a shorter induction period, higher ethylene yield, and improved stability.
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