材料导报
材料導報
재료도보
MATERIALS REVIEW
2011年
10期
69-72
,共4页
AuPd双金属纳米粒子%团聚%层错%合成%电催化性质
AuPd雙金屬納米粒子%糰聚%層錯%閤成%電催化性質
AuPd쌍금속납미입자%단취%층착%합성%전최화성질
AuPd bimetallic nanoparticles%agglomerates%surface defect%synthesis%electrocatalytic activity
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.
室溫下以水閤肼為還原劑,在N,N-二甲基甲酰胺中閤成瞭糰聚態的AuPd雙金屬納米粒子.X射線衍射(XRD)錶徵結果證明,所閤成的AuPd納米粒子具有麵心立方結構.高分辨透射電子顯微鏡錶徵錶明,AuPd納米粒子錶麵存在大量孿晶結構和晶麵層錯等錶麵缺陷.活性評價結果錶明,具有高密度晶麵缺陷的雙糰聚態AuPd納米粒子對甲醇氧化錶現齣較好的催化活性.
실온하이수합정위환원제,재N,N-이갑기갑선알중합성료단취태적AuPd쌍금속납미입자.X사선연사(XRD)표정결과증명,소합성적AuPd납미입자구유면심립방결구.고분변투사전자현미경표정표명,AuPd납미입자표면존재대량련정결구화정면층착등표면결함.활성평개결과표명,구유고밀도정면결함적쌍단취태AuPd납미입자대갑순양화표현출교호적최화활성.
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 investigated 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 with face central cubic(fcc) structure enclosed by flat {100} and {111} 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 electrocatalytic activities.
