Hydrogenation of methyl acetate to ethanol over a highly stable Cu/SiO₂ catalyst: Reaction mechanism and structural evolution

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• 作者：Xiumin Huang^a ; ^{hxiumin@dicp.ac.cn} ; Meng Ma^a ; Shu Miao^a ; Yanping Zheng^b ; Mingshu Chen^b ; Wenjie Shen^a ; ^{shen98@dicp.ac.cn}
• 关键词：Cu/SiO2 catalyst ; Core-shell structure ; Methyl acetate ; Hydrogenation ; Stability
• 刊名：Applied Catalysis A: General
• 出版年：2017
• 出版时间：5 February 2017
• 年：2017
• 卷：531
• 期：Complete
• 页码：79-88
• 全文大小：2465 K
• 卷排序：531

文摘

A core-shell structured Cu/SiO2 catalyst with a copper particle size of 4-7 nm and a SiO2 shell of 1 nm was developed. The catalyst was highly active and stable for methyl acetate hydrogenation to ethanol. The copper particles were not enlarged during 96 h reaction at 523 K. The Cu+/(Cu0+Cu+) ratio increased during the reaction due to the competitive adsorption of methyl acetate and hydrogen. A proper Cu+/(Cu0+Cu+) ratio is the prerequisite for achieving a durable catalyst with higher catalytic performance.