Li Jiajuan, Wang Zizhu, Ma Yirui, Xu Caiyun, Zhou Shenghu
Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China.
ACS Omega. 2023 Mar 20;8(13):12339-12347. doi: 10.1021/acsomega.3c00076. eCollection 2023 Apr 4.
In this work, mesoporous silica SBA-16-supported NiCo bimetallic nanocatalysts were synthesized by coimpregnation of Ni and Co precursors followed by calcination and reduction, and various characterization techniques confirm the formation of NiCo bimetallic nanostructures in the catalysts. The synthesized NiCo/SBA-16 shows enhanced catalytic performance for hydrogenation of a series of nitroaromatics. Under the reaction conditions of 80 °C and 1.0 MPa of H, the yields of aniline for nitrobenzene hydrogenation over NiCo/SBA-16 can reach more than 99% at 2.0 h. The enhanced catalytic performance can be ascribed to the formation of NiCo bimetallic nanostructures, where the synergistic effect between Ni and Co improves their catalytic activities for hydrogenation of nitroaromatics.
在本工作中，通过共浸渍镍和钴前驱体，随后进行煅烧和还原，合成了介孔二氧化硅SBA - 16负载的镍钴双金属纳米催化剂，各种表征技术证实了催化剂中镍钴双金属纳米结构的形成。合成的NiCo/SBA - 16对一系列硝基芳烃的氢化反应表现出增强的催化性能。在80℃和1.0MPa氢气的反应条件下，NiCo/SBA - 16上硝基苯氢化制苯胺的产率在2.0h时可达到99%以上。催化性能的增强可归因于镍钴双金属纳米结构的形成，其中镍和钴之间的协同效应提高了它们对硝基芳烃氢化反应的催化活性。
