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研究论文

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
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  • 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

  网络出版日期: 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
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  • (Shanghai Key Laboratory for Molecular Catalysis and Innovative Materials,Department of Chemistry,Fudan University,Shanghai 200433,China

Received date: 2009-11-28

  Revised date: 2009-11-28

  Online published: 2009-11-28

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.

本文引用格式

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, 2009 , 15(4) : 377 -381 . DOI: 10.61558/2993-074X.2011

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.
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