钯镍合金薄膜电极上甲酸电氧化-去合金化效应

doi:10.61558/2993-074X.2011

电化学（中英文） ›› 2009, Vol. 15 ›› Issue (4): 377-381. doi: 10.61558/2993-074X.2011

钯镍合金薄膜电极上甲酸电氧化-去合金化效应

王超;史菲菲;王金意;张涵轩;蔡文斌;

复旦大学上海市分子催化和功能材料重点实验室化学系;

收稿日期:2009-11-28 修回日期:2009-11-28 出版日期:2009-11-28 发布日期:2009-11-28

Electrooxidation of Formic Acid on Pd-Ni Alloy Film Electrode-The Effect of Dealloying

WANG Chao,SHI Fei-fei,WANG Jin-yi,ZHANG Han-xuan,CAI Wen-bin*

(Shanghai Key Laboratory for Molecular Catalysis and Innovative Materials,Department of Chemistry,Fudan University,Shanghai 200433,China

Received:2009-11-28 Revised:2009-11-28 Published:2009-11-28 Online:2009-11-28

摘要/Abstract

摘要： 在含PdC l2、N iSO4和乙二胺的弱碱性镀液中,于Au电极上用恒电位电沉积Pd-N i合金薄膜,后经酸性溶液中循环伏安法处理,得到去合金化的Pd-N i电极.扫描电镜以及电化学测试表明,去合金化处理使Pd-N i镀膜表面微观粗糙度增加,比表面积增大;ICP-AES和XPS分析证实合金表层N i的优先溶出造成Pd的富集.去合金化处理的Pd-N i电极电催化氧化甲酸的活性明显优于未处理的Pd-N i电极和多晶Pd电极.

关键词: 钯镍合金, 去合金化, 甲酸, 电催化

Abstract: A Pd-Ni alloy film was electrodeposited on Au disc electrode at a constant potential from a weakly basic bath containing PdCl2,NiSO4 and ethylenediamine.The as-deposited film was then subjected to potential cycling in a perchloric acid solution for surface dealloying treatment.The dealloyed Pd-Ni film electrode was examined for the electrocatalytic oxidation of formic acid,and compared with the as-deposited one as well as a Pd film electrode.The FE-SEM and electrochemical measurements on the Pd-Ni films revealed that the dealloying treatment caused a surface roughening and an increase in specific surface reaction area.The ICP-AES and XPS analyses demonstrated that the preferential dissolution of Ni in the dealloying treatment led to a Pd-rich outer layer in the resultant Pd-Ni film.The electrocatalysis measurements indicated that the dealloyed Pd-Ni electrode is superior to the as-deposited Pd-Ni as well as the Pd electrode in terms of the electro-oxidation of formic acid.

Key words: Pd-Ni alloy, dealloyment, formic acid, electrocatalysis

中图分类号:

O646.54

王超, 史菲菲, 王金意, 张涵轩, 蔡文斌, . 钯镍合金薄膜电极上甲酸电氧化-去合金化效应[J]. 电化学（中英文）, 2009, 15(4): 377-381.

WANG Chao, SHI Fei-fei, WANG Jin-yi, ZHANG Han-xuan, CAI Wen-bin. Electrooxidation of Formic Acid on Pd-Ni Alloy Film Electrode-The Effect of Dealloying[J]. Journal of Electrochemistry, 2009, 15(4): 377-381.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.61558/2993-074X.2011

https://electrochem.xmu.edu.cn/CN/Y2009/V15/I4/377

参考文献

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钯镍合金薄膜电极上甲酸电氧化-去合金化效应

Electrooxidation of Formic Acid on Pd-Ni Alloy Film Electrode-The Effect of Dealloying

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