Photocatalytic conversion of methane: Catalytically active sites and species
Chem Catalysis(2023)
摘要
The development of direct routes for catalytic functionalization of methane would accelerate the chemical utilization of this abundant carbon resource to produce value-added chemicals or easily transportable fuels. However, the selective transformation of methane remains highly challenging due to the dilemma between the activation of inert C−H bond and the keeping of vulnerable target products from over-oxidation or deep dehydrogenation. A number of studies have been devoted to selective methane transformations by heterogeneous photocatalysis. Unlike a comprehensive review of the field, this article focuses on the insights into the catalytically active sites/species, which are usually overlooked in photocatalysis, and offers the strategies that may facilitate selective methane conversions by manipulating the active sites/species at surface/interface regions. The key factors that determine not only the C−H activation but also the selectivity control are discussed. The future opportunities for photocatalytic methane conversions by rationally controlling catalytic active sites/species are analyzed.
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关键词
methane,photocatalysis,C−H activation,active site,active species,selectivity control,semiconductor
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