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Silver-modulated SiO2-supported copper catalysts for selective hydrogenation of dimethyl oxalate to ethylene glycol

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タイトル: Silver-modulated SiO2-supported copper catalysts for selective hydrogenation of dimethyl oxalate to ethylene glycol
著者: Huang, Ying 著作を一覧する
Ariga, Hiroko 著作を一覧する
Zheng, Xinlei 著作を一覧する
Duan, Xinping 著作を一覧する
Takakusagi, Satoru 著作を一覧する
Asakura, Kiyotaka 著作を一覧する
Yuan, Youzhu 著作を一覧する
キーワード: Copper
Silver
Hydrogenation
Dimethyl oxalate
Ethylene glycol
発行日: 2013年11月
出版者: Academic Press Inc. Elsevier Science
誌名: Journal of catalysis
巻: 307
開始ページ: 74
終了ページ: 83
出版社 DOI: 10.1016/j.jcat.2013.07.006
抄録: We present the application of a one-step urea-assisted gelation method to prepare a SiO2-supported bimetallic catalyst composed of copper (Cu) and silver (Ag). Results show the remarkably enhanced performance of the catalyst for selective hydrogenation of dimethyl oxalate (DMO) to ethylene glycol (EG). Coupled with a series of characterization and kinetic studies, the improved activity is attributed to the formation of Cu nanoparticles containing Ag nanoclusters on the SiO2 surface. The coherent interactions between the Cu and Ag species help create the active Cu+/Cu-0 species in a suitable proportion and prevent the transmigration of bimetallic nanoparticles during the hydrogenation process. The optimized Cu-Ag/SiO2 catalyst with an Ag/Cu atomic ratio of 0.05 has a balanced Cu+/Cu-0 ratio and highly dispersed bimetal particles, which account for its high turnover frequency, EG selectivity of 97.0%, and excellent catalytic stability during the hydrogenation of DMO to EG for longer than 150 h.
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/54629
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 朝倉 清高

 

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