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NATURE CATALYSIS
Volume -, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41929-023-01030-2
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This study reports an artificial process for the direct conversion of methane to C1 oxygenates at low temperature using an edge-rich MoS2 catalyst. The catalyst exhibits high conversion rate and selectivity in converting methane to valuable chemicals at 25 degrees C.
Conversion of methane to value-added chemicals at low temperature by directly using inexpensive O-2 as oxidant offers an ideal route for methane utilization but remains a great challenge due to the chemical inertness of methane and the low activity of O-2. Methane monooxygenase is the only known natural catalyst that can convert methane with O-2 at room temperature. Here we report the realization of an artificial process for the direct methane conversion to C1 oxygenates with O-2 on an edge-rich MoS2 catalyst at 25 degrees C, which delivers a remarkable methane conversion of 4.2% with >99% selectivity for C1 oxygenates. In situ spectroscopic and microscopic characterizations and theoretical calculations reveal that the binuclear molybdenum sites of sulfur vacancies at the MoS2 edge can directly dissociate O-2 to form O=Mo=O* active species, which can activate the C-H bond and enable methane conversion at room temperature.
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