室温合成团聚AuPd纳米粒子及其电催化性质(英文)  

Room Temperature Synthesis and Characterization of Agglomerates of AuPd Bimetallic Nanoparticles

作　　者：冯苍松[1] 梁新义[1,2] 崔兰[3] 

机构地区：[1]天津商业大学天津市食品生物技术重点实验室,天津300134 [2]天津商业大学应用化学系,天津300134 [3]天津大学材料学院,天津300072

出　　处：《材料导报》2011年第10期69-72,共4页Materials Reports

基　　金：天津市自然科学基金(06YFJMJC12600);天津市自然科学基金重点项目(10JCZDJC23600);教育部留学回国人员科研启动基金资助项目(20071108)

摘　　要：室温下以水合肼为还原剂,在N,N-二甲基甲酰胺中合成了团聚态的AuPd双金属纳米粒子。X射线衍射(XRD)表征结果证明,所合成的AuPd纳米粒子具有面心立方结构。高分辨透射电子显微镜表征表明,AuPd纳米粒子表面存在大量孪晶结构和晶面层错等表面缺陷。活性评价结果表明,具有高密度晶面缺陷的双团聚态AuPd纳米粒子对甲醇氧化表现出较好的催化活性。A facile synthesis of the agglomerates of AuPd bimetallic nanoparticles with hydrazine hydrate as a reductant is presented. The structures and morphologies of the agglomerates of AuPd bimetallic nanoparticles were in- vestigated by high-resolution transmission electron microscopy（HRTEM） and X-ray diffraction（XRD）. The composition and catalytic property of the AuPd bimetallic nanoparticles were studied by energy dispersive X-ray spectroscopy （EDS） and cyclic voltammetry（CV）. The as-synthesized AuPd nanoparticles display agglomerates wilh face central cubic（fce） structure enclosed by flat {100} and {lll} facets. The details of HRTEM image reveal that unstable small nanoparticles aggregate into the agglomerates of structures. And the surface structure of nanoparticles yields various types of surface defects. Meanwhile, the agglomerates of structure and high density surface defects of AuPd bimetallic nanoparticle are found to dramatically improve the electroeatalytic activities.

关 键 词：AuPd双金属纳米粒子 团聚 层错 合成 电催化性质 

分 类 号：TB44[一般工业技术]