Hydrogenation of cinnamaldehyde over bimetallic Au-Cu/CeO_2 catalyst under a mild condition  

作　　者：Xue-Mei Liao Veronique Pitchon Pham-Huu Cuong Wei Chu Valerie Caps 

机构地区：[1]College of Food and Biological Engineering, Xihua University [2]ICPEES, L'Institut de Chimie et Procedes pour l'energie, l'environnement et la santé, Université de Strasbourg [3]Department of Chemical Engineering, Sichuan University

出　　处：《Chinese Chemical Letters》2017年第2期293-296,共4页中国化学快报（英文版）

基　　金：the Chinese Scholarship Council (CSC), French Eiffel Scholarship for financial supports of Xuemei Liao;the financial supported by the Open Research Subject of key laboratory (Research Base) of Grain and Oil Engineering and food safety (No. szjj2015-006);Agricultural and Forestry Talents in Food quality and safety, Key Research Fund of Xihua University (No. Z1520527)

摘　　要：Bimetallic Au_xCu_y/CeO_2（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 Au_xCu_y/CeO_2 pretreated 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.Bimetallic Au_xCu_y/CeO_2（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 Au_xCu_y/CeO_2 pretreated 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.

关 键 词：Hydrogenation of cinnamaldehyde Bimetallic Au-Cu catalysts Reduction or calcination Distribution Alloy 

分 类 号：TQ203.5[化学工程—有机化工] O643.36[理学—物理化学]