Ag/Pd纳米复合自组装膜的制备与电催化性质  

Preparation of Ag/Pd Nanocomposite Thin Films by Layer-by-Layer Assembly Technique and Their Electrocatalytic Properties

作　　者：张莉[1] 王聪[1] 王红艳[1] 张超[1] 

机构地区：[1]宿州学院自旋电子与纳米材料安徽省重点实验室培育基地,安徽宿州234000

出　　处：《稀有金属材料与工程》2012年第10期1809-1813,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(20871089;21271136);安徽省教育厅自然科学研究重大项目(KJ2010ZD09)和重点项目(KJ2007A076)

摘　　要：利用层层静电自组装技术将聚乙烯亚胺(PEI-Ag+)、PdCl42-交替沉积在基底上,然后用硼氢化钠还原,构筑了含银/钯复合纳米粒子的PEI-Ag/Pd纳米复合薄膜。通过扫描电子显微镜(FESEM),X射线光电子能谱(XPS)和循环伏安(CV)等手段对复合膜的成分、微结构和性质进行了测试分析。膜上生成了不规则和立方体状的银/钯纳米复合物,导致膜表面有一定的粗糙度。结果表明,双金属{PEI-Ag/Pd}n复合膜比单金属{PEI/Pd}n或{PEI-Ag/PSS}n膜对多巴胺的氧化有更好的电催化活性。Nanocomposite thin films containing Ag/Pd nanoparticles PEI-Ag/Pd were formed by alternating adsorption of PEI-Ag＋ and PdCl4 2by a layer-by-layer self-assembly technique and subsequent postdeposition reduction by sodium borohydride（NaBH 4）.The composition,microstructure and properties were characterized by field emission scanning electron microscopy（FESEM）,X-ray photoelectron spectroscopy（XPS）,and cyclic voltammetry（CV）.The Ag/Pd nanocomposites which are irregular and cubic are formed in the films,resulting in a rough surface of the composite film.The results indicate that the {PEI-Ag/Pd}n nanocomposite film exhibits better electrocatalytic activity for the oxidation of dopamine than {PEI/Pd} n and {PEI-Ag/PSS}n films.

关 键 词：Ag/Pd纳米复合薄膜 层层自组装 电催化 

分 类 号：TB383.2[一般工业技术—材料科学与工程]