文献类型：期刊文献

中文题名：Manipulation of the PdAu-PdAuO_(x)interface on Pd-Au bimetallic catalysts for the direct synthesis of hydrogen peroxide

作者：Jixuan Zhang[1];Pengfei Tian[2];Aihao Xu[3];Like Ouyang[4];Zixu Yang[1];Jing Xu[1,3]

机构：[1]State Key Laboratory of Chemical Engineering,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Key Laboratory of Pressure Systems and Safety,Ministry of Education,East China University of Science and Technology,Shanghai 200237,China;[3]Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;[4]College of Chemical Engineering,Sichuan University,Chengdu 610065,China

年份：2023

卷号：34

期号：11

起止页码：195

中文期刊名：Chinese Chemical Letters

外文期刊名：中国化学快报（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；PubMed;

基金：supported by the National Natural Science Foundation of China(Nos.91934302 and 22178110);the Dean/Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology(No.2020K001);the Project of the Department of Science and Technology of Sichuan Province(No.2023YFQ0086).

语种：英文

中文关键词：H_(2)O_(2)synthesis;Bimetallic catalysts;Palladium particle size;Pd^(0)/Pd^(2+)ratio;Structure-performance relationship

摘要：Direct synthesis of H_(2)O_(2)from H_(2) and O_(2)via heterogeneous catalysis is an environmentally friendly and atomically economic alternative to the traditional anthraquinone oxidation(AO)process.Optimizing the electronic and geometric structures of the active metals to break the current limitations of hydrogenation rate and H_(2)O_(2)selectivity is a promising and challenging topic.In this study,a series of Pd-Au bimetallic catalysts supported on TiO_(2)with a metal loading of 3.0 wt%and a constant Pd/Au molar ratio(Pd:Au=2:1)were prepared.The catalysts were reduced in H_(2) at different temperatures(473,573 and 673 K),and their catalytic activity for the direct H_(2)O_(2)synthesis were evaluated at 283 K and 0.1MPa.H_(2) reduced Pd-Au catalysts exhibited superior performance in direct H_(2)O_(2)synthesis.The maximum H_(2)O_(2)selectivity of 87.7%and H_(2)O_(2)yield of 3116.4 mmol h^(?1) gPd^(?1) were achieved over the Pd_(2.0)Au_(1.0)-573 catalyst with a H_(2) conversion of 12.8%.The tailored local chemical environment caused by H_(2) reduction creates a balanced ratio of Pd0 and PdO_(x) sites,thus improving the selectivity towards H_(2)O_(2).This work developed an effective strategy for fabrication of highly active and stable Pd-based H_(2)O_(2)synthesis catalysts with high H_(2)O_(2)yield.