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- W2393154927 abstract "The X-ray photoelectron spectroscopy (XPS) was used to investigate the surface characteristic of potassium-promoted or un-promoted both β-Mo2C and α-MoC1-x pretreated by syngas at different temperatures,and the promotional effect of potassium on the catalytic performance was also studied.XPS results revealed that the content of surface Mo and its valence distribution between β-Mo2C and α-MoC1-x were quite different.Promoted by potassium,the remarkable changes were observed for surface composition and valence of Mo distribution over β-Mo2C.Potassium had strong electronic effect on β-Mo2C,which led to a higher Mo4+ content.On the contrary,potassium had little electronic effect on α-MoC1-x,and K-Mo interaction was weak.Therefore,Mo0 and Mo2+ became the dominant species on the catalyst surface,and the Mo4+ content showed almost no increase as the pretreatment temperature enhanced.In terms of catalytic performance of molybdenum carbides,the increase in Mo0 most likely explained the increase in hydrocarbon selectivity,yet Mo4+ might be responsible for the alcohols synthesis." @default.
- W2393154927 created "2016-06-24" @default.
- W2393154927 creator A5051643311 @default.
- W2393154927 date "2010-01-01" @default.
- W2393154927 modified "2023-09-26" @default.
- W2393154927 title "XPS study of potassium-promoted molybdenum carbides for mixed alcohols synthesis via CO hydrogenation" @default.
- W2393154927 hasPublicationYear "2010" @default.
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