负载型Au-Ni合金催化剂应用于芳香硝基化合物选择加氢反应(英文)  

Supported Au-Ni nano-alloy catalysts for the chemoselective hydrogenation of nitroarenes

作　　者：魏海生[1,2] 卫星[1] 杨小峰[1] 银光照 王爱琴[1] 刘晓艳[1] 黄延强[1] 张涛[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]中国科学院大学,北京100049 [3]大连理工大学化工学院,辽宁大连116024

出　　处：《催化学报》2015年第2期160-167,共8页

基　　金：supported by the National Natural Science Foundation of China(21176235,21203182,21202163,21303194,and 21373206);the Hundred Talents Program of Dalian Institute of Chemical Physics,Chinese Academy of Sciences~~

摘　　要：采用改进的两步还原法制备了SiO2负载的Au-Ni合金催化剂,催化剂中Au-Ni纳米颗粒高度分散于SiO2载体表面.Au-Ni合金催化剂在温和条件下芳香硝基化合物选择加氢反应中表现出比两种单金属催化剂更高的活性和选择性,体现出Au-Ni之间明显的协同作用.其中AuNiSiO2催化剂具有最好的性能,反应70 min,转化率和选择性分别达到90.8%和93.0%.A modified two-step approach was developed for the synthesis of uniform and highly dispersed Au-Ni alloy nanoparticles on a silica support The supported Au-Ni alloy nanoparticles were investigated for the chemoselective hydrogenation of substituted nitroarenes,which showed a strong synergistic effect between Au and Ni.The best catalyst was AuNi_3/SiO_2 that afforded a selectivity to3-vinylaniline of 93.0%at a 3-nitrostyrene conversion of 90.8%after 70 min under mild conditions.

关 键 词：金-镍 合金 选择加氢 芳香硝基化合物 

分 类 号：O625.6[理学—有机化学] O643.36[理学—化学]