CIESC Journal ›› 2012, Vol. 63 ›› Issue (12): 3882-3888.DOI: 10.3969/j.issn.0438-1157.2012.12.021

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Electro-catalytic dechlorination performance of LaNi5 hydrogen storage electrode modified by palladium

HE Zhiqiao, LIN Keji, CHEN Jianmeng, SONG Shuang   

  1. College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China
  • Received:2012-04-16 Revised:2012-06-20 Online:2012-07-17 Published:2012-12-05
  • Supported by:

    supported by the National Natural Science Foundation of China(20977086).

Pd修饰LaNi5贮氢电极的电催化脱氯性能

何志桥, 林科吉, 陈建孟, 宋爽   

  1. 浙江工业大学生物与环境工程学院, 浙江 杭州 310032
  • 通讯作者: 宋爽
  • 作者简介:何志桥(1973-),男,副教授。
  • 基金资助:

    国家自然科学基金项目(20977086)。

Abstract: 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稬-1,apparent current density 10 mA穋m-2,pH 4.0 and Pd loading 1.8 mg穋m-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.

Key words: Pd/LaNi5 electrode, 4-chlorophenol, electro-catalytic reduction, dechlorination

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0.1 mmol·L-1、表观电流密度10 mA·cm-2、pH 4.0和钯载量1.8 mg·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。

关键词: Pd/LaNi5电极, 对氯苯酚, 电催化还原, 脱氯

CLC Number: