钛基PbO2＋nano-WO3电极材料的复合共沉积及析氧活性  

Preparation of PbO_2+nano-WO_3 Composite Electrode on Ti Substrate by Composite Electrodeposition and Its Oxygen Evolution Activity

作　　者：丹媛媛[1,2] 张丽[1] 陈立庄[1] 岳慧娟[2] 林海波[3] 陆海彦[3] 

机构地区：[1]江苏科技大学生物与化学工程学院,镇江212003 [2]吉林大学无机合成与制备化学国家重点实验室,长春130012 [3]吉林大学化学学院,长春130012

出　　处：《高等学校化学学报》2014年第12期2632-2637,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21201087,21273097);江苏省自然科学基金(批准号:BK20130460,BK20131244);无机合成与制备化学国家重点实验室(吉林大学)开放课题(批准号:2014-14);江苏省高等学校自然科学研究项目(批准号:11KJB150004)资助~~

摘　　要：利用复合共沉积法,在涂有中间层SnO2-Sb2O5的Ti基体上制备了PbO2+nano-WO3复合电极材料.采用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)和双电层电容法等对复合电极表面的组成、结构、形貌及有效电化学面积进行测试.结果表明,随着纳米WO3掺杂量逐渐增大,复合电极的表面粗糙度和孔隙率逐渐变大,电化学有效面积也随之增大;利用线性扫描及Tafel曲线等电化学测试方法研究了nano-WO3的掺杂对复合电极析氧活性的影响,结果表明,掺杂nano-WO3的复合电极较纯PbO2电极的析氧活性大幅提高,其起始析氧电位发生负移,析氧过电位下降,最大可降低近300 m V.PbO2＋nano-WO3 composite electrode materials were prepared by the composite electrodeposition method on Ti substrate with the intermediate SnO2-Sb2 O5 layer. The composition, structure and morphology of the composite electrode materials were investigated by X-ray diffraction（ XRD） , X-ray photoelectron spectros-copy（XPS）, scanning electron microscopy（SEM） analyses and double layer capacitance methode. The results indicate that porosity, roughness and electrochemically effective area of the composite electrode surface are in-creased because of the embedded nano-WO3 . Then, the composite electrodes were used as anodes for oxygen evolution reaction（ OER） . The activities for the OER of the composites were explained by recording linear scanning voltammograms and Tafel plots. In contrast with the PbO2 electrode without nano-WO3 , oxygen evo-lution onset potentials of the composite electrodes become lower, the overpotentials for oxygen evolution of composite electrodes are decreased, and the OER activities are improved significantly. The overpotential for oxygen evolution at the composite electrode could be lowered by approximately 300 mV compared to that of PbO2 electrode without nano-WO3 .

关 键 词：二氧化铅 三氧化钨 复合共沉积 析氧活性 

分 类 号：O646[理学—物理化学]