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

doi:10.3969/j.issn.0438-1157.2012.12.021

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

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

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

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:

O646
X703

HE Zhiqiao, LIN Keji, CHEN Jianmeng, SONG Shuang. Electro-catalytic dechlorination performance of LaNi₅ hydrogen storage electrode modified by palladium[J]. CIESC Journal, 2012, 63(12): 3882-3888.

何志桥, 林科吉, 陈建孟, 宋爽. Pd修饰LaNi₅贮氢电极的电催化脱氯性能[J]. 化工学报, 2012, 63(12): 3882-3888.

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

Pd修饰LaNi₅贮氢电极的电催化脱氯性能

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