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电化学近期研究专辑(厦门大学 姜艳霞教授主编)

Pd-Cu/C上甲酸根电催化氧化及其去合金化效应

  • 蒋昆 ,
  • 王晔 ,
  • 林涛 ,
  • 蔡文斌
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  • 复旦大学 化学系,能源材料协同创新中心,上海市分子催化和功能材料表面重点实验室,上海 200433

收稿日期: 2014-01-24

  修回日期: 2014-04-01

  网络出版日期: 2014-04-10

基金资助

国家自然科学基金项目(No. 21073045,No. 21273046)和上海市重点项目(No. 11JC140200,No. 08DZ2270500)资助

Electrocatalytic Oxidation of Formate on Pd-Cu/C - Effect of Dealloying Pretreatment

  • JIANG Kun ,
  • WANG Ye ,
  • LIN Tao ,
  • CAI Wen-Bin
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  • Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200433, China

Received date: 2014-01-24

  Revised date: 2014-04-01

  Online published: 2014-04-10

摘要

以柠檬酸钠为稳定剂,通过一锅法在乙二醇体系中制得高分散的Pd-Cu/C二元合金催化剂. 用高分辨透射电镜和XRD观察、表征其形貌和结构,经重复循环扫描对Pd-Cu/C催化剂进行去合金化处理,研究了去合金效应对甲酸根电催化氧化性能的影响. 通过吸附CO的原位ATR-IR光谱测量,初步探讨了去合金前后催化剂表面结构的改变. 研究表明,Cu的去合金化可提高Pd-Cu/C电极初始的电催化氧化活性,但不利于其长时间的活性保持;合金化Pd-Cu/C电极电催化稳定性有显著的优势.

本文引用格式

蒋昆 , 王晔 , 林涛 , 蔡文斌 . Pd-Cu/C上甲酸根电催化氧化及其去合金化效应[J]. 电化学, 2014 , 20(4) : 343 -348 . DOI: 10.13208/j.electrochem.131173

Abstract

Carbon supported highly dispersed Pd-Cu nanoalloy catalyst toward formate electrooxidation is prepared via one-pot synthesis by using ethylene glycol as the reducing agent and sodium citrate as the stabilizer. The as-prepared catalyst is structurally characterized by TEM and XRD. The Cu dealloyment is carried out through repetitive potential cycling of the Pd-Cu/C catalyst in an acidic solution. The dealloying effect on the performance of the Pd-Cu/C is investigated by using cyclic voltammetry and chronoamperometry, and the surface structural change of Pd-Cu/C is probed by in situ ATR-IR measurement. The results show that the as-prepared Pd-Cu/C processes a better long-term stability than the dealloyed one in electrocatalytic oxidation of formate, while the dealloyed Pd-Cu/C exhibits a higher initial electrocatalytic activity.
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