气候变化领域集成服务门户(CCPortal): Water-promoted interfacial pathways in methane oxidation to methanol on a CeO2-Cu2O catalyst

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DOI	10.1126/science.aba5005
	Water-promoted interfacial pathways in methane oxidation to methanol on a CeO2-Cu2O catalyst
	Liu Z.; Huang E.; Orozco I.; Liao W.; Palomino R.M.; Rui N.; Duchoň T.; Nemšák S.; Grinter D.C.; Mahapatra M.; Liu P.; Rodriguez J.A.; Senanayake S.D.
发表日期	2020
ISSN	0036-8075
起始页码	513
结束页码	517
卷号	368 期号:6490
英文摘要	Highly selective oxidation of methane to methanol has long been challenging in catalysis. Here, we reveal key steps for the promotion of this reaction by water when tuning the selectivity of a well-defined CeO2/Cu2O/Cu(111) catalyst from carbon monoxide and carbon dioxide to methanol under a reaction environment with methane, oxygen, and water. Ambient-pressure x-ray photoelectron spectroscopy showed that water added to methane and oxygen led to surface methoxy groups and accelerated methanol production. These results were consistent with density functional theory calculations and kinetic Monte Carlo simulations, which showed that water preferentially dissociates over the active cerium ions at the CeO2–Cu2O/Cu(111) interface. The adsorbed hydroxyl species blocked O-O bond cleavage that would dehydrogenate methoxy groups to carbon monoxide and carbon dioxide, and it directly converted this species to methanol, while oxygen reoxidized the reduced surface. Water adsorption also displaced the produced methanol into the gas phase. © 2020 American Association for the Advancement of Science. All rights reserved.
关键词	carbon dioxide carbon monoxide cerium oxide copper oxide methane methanol oxygen water adsorption carbon dioxide carbon monoxide catalysis catalyst chemical bonding inorganic compound methane oxidation adsorption Article catalysis chemical bond chemical reaction dehydrogenation dissociation environment oxidation priority journal X ray photoemission spectroscopy
语种	英语
来源机构	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133533
推荐引用方式 GB/T 7714	Liu Z.,Huang E.,Orozco I.,et al. Water-promoted interfacial pathways in methane oxidation to methanol on a CeO2-Cu2O catalyst[J]. Science,2020,368(6490).
APA	Liu Z..,Huang E..,Orozco I..,Liao W..,Palomino R.M..,...&Senanayake S.D..(2020).Water-promoted interfacial pathways in methane oxidation to methanol on a CeO2-Cu2O catalyst.,368(6490).
MLA	Liu Z.,et al."Water-promoted interfacial pathways in methane oxidation to methanol on a CeO2-Cu2O catalyst".368.6490(2020).