Surface Coordination Decouples Hydrogenation Catalysis on Supported Metal Catalysts  

作　　者：Qingyuan Wu Wenting Zhou Hui Shen Ruixuan Qin Qiming Hong Xiaodong Yi Nanfeng Zheng 

机构地区：[1]State Key Laboratory for Physical Chemistry of Solid Surfaces,Collaborative Innovation Center of Chemistry for Energy Materials,National&Local Joint Engineering Research Center for Preparation Technology of Nanomaterials,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005 [2]Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM),Xiamen 361102

出　　处：《CCS Chemistry》2023年第5期1215-1224,共10页中国化学会会刊（英文）

基　　金：supported by the National Key R&D Program of China(grant no.2017YFA0207302);the National Natural Science Foundation of China(grant nos.21890752,21731005,21721001).

摘　　要：Supported metal catalysts integrating advantages of catalytic hydrogenation and stoichiometric reduction are highly desirable for the green production of fine chemicals.Decoupling catalytic hydrogenation into H_(2)activation and selective reduction taking place at different locations is expected to provide an effective strategy to fabricate such catalyst systems.Herein,we report a decoupled hydrogenation system by modifying Pt catalysts supported on reducible In2O3 with ethylenediamine(EDA).The system exhibits good catalytic performance in oximes production from nitroalkanes,an industrially important reaction,by employing H_(2).Systematic studies demonstrate that the surface coordination of EDA on Pt is crucial to passivate the Pt surface from nitro hydrogenation without inhibiting H_(2)activation.The activated H_(2)species can then transfer and reduce the In_(2)O_(3)support in situ to generate sustainable stoichiometric reducing agents for the chemoselective reduction of nitroalkanes.Based upon the mechanistic understanding,a sustainable strategy for the production of oximes has been successfully fabricated.

关 键 词：hydrogenation catalysis surface coordination reducible support selective hydrogenation of nitro compounds heterogeneous catalysis 

分 类 号：O62[理学—有机化学]