Interfacial oxidized Pd species dominate catalytic hydrogenation of polar unsaturated bonds  

作　　者：Pengyao You Shaoqi Zhan Pengpeng Ruan Ruixuan Qin Shiguang Mo Yazhou Zhang Kunlong Liu Lansun Zheng Nanfeng Zheng 

机构地区：[1]State Key Laboratory for Physical Chemistry of Solid Surfaces,Collaborative Innovation Center of Chemistry for Energy Materials,and Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [2]Department of Chemistry,BMC,Uppsala University,BMC Box 576,Uppsala S-75123,Sweden [3]Department of Chemistry,University of Oxford,Oxford OX13QZ,UK

出　　处：《Nano Research》2024年第1期228-234,共7页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.92261207,21890752,and 22002126)。

摘　　要：The determination of catalytically active sites is crucial for the design of efficient and stable catalysts toward desired reactions.However,the complexity of supported noble metal catalysts has led to controversy over the locations of catalytically active sites(e.g.,metal,support,and metal/support interface).Here we develop a structurally controllable catalyst system(Pd/SBA-15)to reveal the catalytic active sites for the selective hydrogenation of ketones to alcohol using acetophenone hydrogenation as model reaction.Systematic investigations demonstrated that unsupported Pd nanocrystals have no catalytic activity for acetophenone hydrogenation.However,oxidized Pd species were catalytically highly active for acetophenone hydrogenation.The catalytic activity decreased with the decreased oxidation state of Pd.This work provides insights into the hydrogenation mechanism of ketones but also other unsaturated compounds containing polar bonds,e.g.,nitrobenzene,N-benzylidene-benzylamine,and carbon dioxide.

关 键 词：oxidized Pd metal/oxide interface constant particle size Pd/SBA-15 acetophenone hydrogenation 

分 类 号：O64[理学—物理化学]