Hydrogenation of cinnamaldehyde over bimetallic Au-Cu/CeO₂ catalyst under a mild condition

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• 作者：Xue-Mei Liao^a ; ^b ; ^c ; ^{xmliao@mail.xhu.edu.cn} ; Veronique Pitchon^b ; Pham-Huu Cuong^b ; Wei Chu^c ; Valerie Caps^b ; ^{caps@unistra.fr}
• 关键词：Hydrogenation of cinnamaldehyde ; Bimetallic Au-Cu catalysts ; Reduction or calcination ; Distribution ; Alloy
• 刊名：Chinese Chemical Letters
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：28
• 期：2
• 页码：293-296
• 全文大小：823 K
• 卷排序：28

文摘

Bimetallic AuxCuy/CeO2 (x/y = 3/1, 1/1, and 1/3) catalysts were prepared by direct anion exchange (DAE), following impregnation (IMP) methods, and used for selective hydrogenation of cinnamaldehyde. The effects of pretreatments, such as calcination or reduction on the catalytic activities of these catalysts were investigated. XRD and HRTEM showed that for the reduced catalysts, there is the formation of an Au–Cu alloy. HAADF-STEM displayed that reduction pretreatment leads to a very homogenous distribution of Au and Cu on the external catalyst surface. Reaction parameters, such as CAL concentration, the stirring speed, nature of the solvent influence the catalytic activities. Pretreatments lead to a major effect on CAL conversion and HCAL selectivity. Catalysts AuxCuy/CeO2pretreated under reduction display higher CAL conversion and HCAL selectivity than that of under calcination mainly due to the synergistic effect resulting in a formation of Au–Cu alloy.