Silica-modified Pt/TiO_(2) catalysts with tunable suppression of strong metal-support interaction for cinnamaldehyde hydrogenation  

作　　者：Zhengjian Hou Yuanyuan Zhu Hua Chi Li Zhao Huijie Wei Yanyan Xi Lishuang Ma Xiang Feng Xufeng Lin 

机构地区：[1]College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China [2]Advanced Chemical Engineering and Energy Materials Research Center,China University of Petroleum(East China),Qingdao 266580,China [3]State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 266580,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第6期189-198,共10页中国化学工程学报（英文版）

基　　金：the National Natural Science Foundation of China(21576291,22003076);National Natural Science Foundation of China-Outstanding Youth foundation(22322814);the Fundamental Research Funds for the Central Universities(23CX03007A,22CX06012A)are gratefully acknowledge。

摘　　要：Tuning Strong Metal-support Interactions(SMSI)is a key strategy to obtain highly active catalysts,but conventional methods usually enable TiO_(x) encapsulation of noble metal components to minimize the exposure of noble metals.This study demonstrates a catalyst preparation method to modulate a weak encapsulation of Pt metal nanoparticles(NPs)with the supported TiO_(2),achieving the moderate suppression of SMSI effects.The introduction of silica inhibits this encapsulation,as reflected in the characterization results such as XPS and HRTEM,while the Ti^(4+) to Ti^(3+) conversion due to SMSI can still be found on the support surface.Furthermore,the hydrogenation of cinnamaldehyde(CAL)as a probe reaction revealed that once this encapsulation behavior was suppressed,the adsorption capacity of the catalyst for small molecules like H_(2) and CO was enhanced,which thereby improved the catalytic activity and facilitated the hydrogenation of CAL.Meanwhile,the introduction of SiO_(2) also changed the surface structure of the catalyst,which inhibited the occurrence of the acetal reaction and improved the conversion efficiency of C=O and C=C hydrogenation.Systematic manipulation of SMSI formation and its consequence on the performance in catalytic hydrogenation reactions are discussed.

关 键 词：Pt catalyst Silica modification HYDROGENATION CINNAMALDEHYDE Strong metal-support interaction 

分 类 号：TQ426[化学工程]