中文摘要：

采用吸附相技术在乙醇-水体系中分别制备了硅胶和高岭土负载的Ag-Ni双金属催化剂,并用于硝基苯低温液相加氢制苯胺反应.考察了催化剂中Ni含量和Ni/Ag比对催化剂形貌和活性的影响.结果表明,高岭土或硅胶负载的催化剂在Ni/Ag=5（摩尔比）时活性较高,且都存在一个最佳Ni含量,分别为0.04%和0.03%.在相同条件下,以高岭土负载的Ag-Ni催化剂的活性和苯胺收率更高.

英文摘要：

Ag-Ni bimetallic nano-catalysts were prepared using silica and kaolin as the support by adsorption phase synthesis.The activity of these catalysts was evaluated by liquid-phase hydrogenation of nitrobenzene to aniline.By changing the Ni content and Ni/Ag molar ratio in the catalysts,the differences of morphology and activity between the catalysts on two supports were investigated.The results of temperature-programmed reduction and transmission electron microscopy indicate that the bimetallic catalysts show higher activity when Ni/Ag molar ratio is 5.There is an optimal Ni content in the catalysts on both silica and kaolin,which is 0.04% for kaolin and 0.03% for silica.The catalyst supported by kaolin is more active and has higher aniline yield than the catalyst supported on silica.