银铜双金属纳米合金的制备和电催化性质  

Electrodeposition and Electrocatalytic Properties of Silver-Copper Bimetallic Nanoalloy

作　　者：刘婧[1] 陈福义[1] 张吉晔[1] 樊莉红[1] 张金生[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《材料研究学报》2012年第1期49-54,共6页Chinese Journal of Materials Research

基　　金：国家自然科学基金(50971100;50671082);西北工业大学基础研究基金(NPU-FFR-ZC200931);凝固技术国家重点实验室自主研究课题(30-TP-2009);研究生创业种子基金(Z2011002;Z2010011;Z200915)资助项目~~

摘　　要：采用电沉积方法制备银铜双金属纳米合金,用X射线衍射仪(XRD)及高分辨率透射电子显微镜(HRTEM),扫描电子显微镜(SEM)和电化学工作站分别对样品的结构、微观形貌和电催化性质进行了表征。结果表明,银铜双金属纳米合金电极在H_2O_2溶液中表现出较强的还原电流,可以作为阴极催化剂;随着银铜双金属纳米合金沉积电位的变负,阴极催化作用减弱,形貌由穗状晶向树枝晶转变;随着铜离子浓度的提高,阴极催化作用增强,银铜双金属纳米合金的形貌由树枝晶向棒状晶转变。这意味着,本文观察到了银铜双金属纳米合金的双金属电催化协同效应。Silver-copper （Ag-Cu） bimetallic nanoalloys were prepared by electrodeposition methods and their microstructure, morphology and electrocatalytic properties were characterized by XRD, HRTEM, SEM and electrochemical workstation. The results show that the silver-copper bimetallic nanoalloy electrodes exhibit a large reduction current peak in H202 solutions, indicating that silver-copper bimetallic nanoaltoy can be used as a cathode catalytic. The morphology of silver-copper bimetallic nanoatloys changes from spiciform crystal to dendritic crystal and the cathode catalytic performance decreases with increasing deposition potential; The morphology of the nanoalloys changes from dendritic crystal to rod-shaped crystal and the cathode catalytic performance increases with the increasing of Cu2＋ concentrations. It can be concluded that the synergistic effects are observed in the electrocatalytic performance for silver-copper bimetallic nanoalloys.

关 键 词：金属材料 电化学沉积 银铜双金属纳米合金 催化性能 

分 类 号：TG146[一般工业技术—材料科学与工程]