Pd修饰LaNi_5贮氢电极的电催化脱氯性能  

Electro-catalytic dechlorination performance of LaNi_5 hydrogen storage electrode modified by palladium

作　　者：何志桥[1] 林科吉[1] 陈建孟[1] 宋爽[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032

出　　处：《化工学报》2012年第12期3882-3888,共7页CIESC Journal

基　　金：国家自然科学基金项目(20977086)~~

摘　　要：为提高对氯苯酚(4-CP)脱氯的有效性,采用化学沉积法制备了镧镍合金镀钯电极(Pd/LaNi5),对其进行了X射线衍射(XRD)、扫描电子显微镜(SEM)和线性扫描伏安(LSV)表征。电催化实验结果表明Pd/LaNi5电极显示了比LaNi5电极和Pd/Ni电极更高的4-CP脱氯活性,在初始浓度0.1mmol.L-1、表观电流密度10mA.cm-2、pH 4.0和钯载量1.8mg.cm-2时,4-CP的脱氯率和电流效率分别达到77.3%和0.14%。基于物理化学表征,可以断定电化学脱氯活性的增强主要源于LaNi5更好的储氢能力。To improve dechlorination effectiveness of 4-chlorophenol,palladium-modified lanthanum-nickel electrode（Pd/LaNi5 electrode）was prepared by chemical deposition,and characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）and linear sweep voltammetry（LSV）.The measurement results of electrocatalytic activity show that the dechlorination efficiency is higher for Pd/LaNi5 electrode than for LaNi5 and Pd/Ni electrode.At conditions of 4-CP initial concentration 0.1 mmol·L-1,apparent current density 10 mA·cm-2,pH 4.0 and Pd loading 1.8 mg·cm-2,the dechlorination efficiency was 77.3%,and corresponding current efficiency 0.14%.Based on the physico-chemical characterization,the conclusion is that better hydrogen-storage property of LaNi5 is responsible for the enhancement of electrochemical dechlorination process.

关 键 词：Pd LaNi5电极 对氯苯酚 电催化还原 脱氯 

分 类 号：O646[理学—物理化学] X703[理学—化学]