水滑石负载型PdCu催化剂的制备及性能  

Preparation and performance of hydrotalcite-supported PdCu catalyst

作　　者：符玉绒 许春丽 Fu Yurong;Xu Chunli(Key Laboratory of Applied Surface and Colloid Chemistry,College of Chemistry and Chemical Engineering, Shaanxi Normal University,Xi an 710119,Shaanxi,China)

机构地区：[1]陕西师范大学化学化工学院,应用表面与胶体化学教育部重点实验室,陕西西安710119

出　　处：《工业催化》2018年第12期43-49,共7页Industrial Catalysis

基　　金：国家自然科学基金重大研究计划培育项目(91545130)

摘　　要：以掺杂Cu的类水滑石(Cu-HTs)作为载体,Cu-HTs中高分散的构晶离子Cu^(2+)作为定位剂,利用Cu和Pd间的强相互作用,诱导Pd原子定位分散在载体表面,得到小尺寸和高分散的PdCu双金属纳米催化剂。采用XRD、STEM、XPS、HRTEM等对催化剂结构、物相及组成进行表征。结果表明,PdCu/HTs的纳米颗粒尺寸约为2.4 nm,分散度达36.7%,形成PdCu合金。在苯甲醇氧化反应中考察PdCu/HTs催化剂的性能,苯甲醇可实现完全转化,苯甲醛产率达97%。Small size and highly dispersed PdCu bimetallic nanocatalyst was obtained with Cu-doped hydrotalcite(Cu-HTs)as support,and highly dispersed constitutional Cu 2+in Cu-HTs as positioning agent.Pd atom was directed and dispersed on the surface of the support because of the strong interaction between Cu and Pd.The structure,phase and composition of catalysts were characterized by XRD,TPR,STEM and XPS.It was showed that the size of PdCu/HTs nanoparticle was about 2.4 nm,the dispersion was up to 36.7%,and PdCu alloy was formed.Performance of PdCu/HTs was investigated in aerobic oxidation of benzyl alcohol,complete conversion of benzyl alcohol was achieved and yield of benzaldehyde was reached to 97%.

关 键 词：催化化学 PdCu催化剂 分散性 定位作用 苯甲醇氧化 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]