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%. The Au-Ni alloy supported on SiO2 was prepared by an improved two-step reduction method. The Au-Ni nanoparticles were highly dispersed on the surface of the SiO2 support.Au-Ni alloy catalysts were used in selective hydrogenation of aromatic nitro compounds under mild conditions Showed higher activity and selectivity than the two single metal catalysts, showing the obvious synergetic effect between Au-Ni.Among them, AuNiSiO2 catalyst had the best performance, the reaction was 70 min, the conversion and selectivity were 90.8% And 93.0%.