Effect of impregnation strategy on catalytic hydrogenation behavior of PtCo catalysts supported on La2O2CO3 nanorods

查看全文 作　　者：Fengjun [1,2]Hou;Huahua [1]Zhao;Huanling [1]Song;Lingjun [1,3]Chou;Jun [1]Zhao;Jian [1]Yang;Liang [1]Yan

机构地区：[1]State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;[2]University of Chinese Academy of Sciences, Beijing 100049, China;[3]Suzhou Research Institute of LICP, Chinese Academy of Sciences, Suzhou 215123, China

出　　处：《Journal of Rare Earths》索引2018年第36卷第9期,共9页

基　　金：Project supported by the National Natural Science Foundation of China(21401204,21773272);Science and Technology Project of Suzhou City(SYG201627);Innovation Promotion Association CAS(2017460);the Western Light Program of Chinese Academy of Sciences(2015) 摘　　要：Small Pt and Pt-Co nanoparticles(NPs) stabilized on La_2 O_2 CO_3 nanorods(LOC) were prepared by wet impregnation method,and probed in liquid-phase chemoselective hydrogenation of crotonaldehyde(CRAL) to crotyl alcohol(CROL).It is found that incorporation of Co atoms into Pt catalyst significantly improves the hydrogenation activity and desired selectivity to CROL as it destroys the Pt-lanthanum interfaces and results into the formation of Pt-Co particles.In addition,a close examination of catalyst surface and reactive performance suggests that the impregnation sequence of Pt and Co exerts great influence on the physicochemical property and the catalytic hydrogenation behavior of PtCo/LOC catalysts.As a result of the interaction between Pt and Co species,high alloying degree of Pt-Co NPs is obtained in the co-impregnated catalyst(Pt-Co/LOC),thus achieving the highest hydrogenation activity.The selective deposit of Co atoms onto the low-coordinated Pt sites leads to the smallest metal particle size and high dispersion of Pt-Co NPs over the Pt/Co/LOC,giving rise to the highest selectivity and yield to CROL. 关键词：催化剂表面催化加氢受精行为准备方法 LOC 液体原子

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Effect of impregnation strategy on catalytic hydrogenation behavior of PtCo catalysts supported on La2O2CO3 nanorods

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