Pd-Cu/C上甲酸根电催化氧化及其去合金化效应

doi:10.13208/j.electrochem.131173

电化学（中英文） ›› 2014, Vol. 20 ›› Issue (4): 343-348. doi: 10.13208/j.electrochem.131173

• 电化学近期研究专辑（厦门大学姜艳霞教授主编） • 上一篇下一篇

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^*

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 出版日期:2014-08-28 发布日期:2014-04-10
通讯作者: 蔡文斌 E-mail:wbcai@fudan.edu.cn
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^*

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:2014-01-24 Revised:2014-04-01 Published:2014-08-28 Online:2014-04-10
Contact: CAI Wen-bin E-mail:wbcai@fudan.edu.cn

摘要/Abstract

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.

关键词: 钯铜合金, 电催化剂, 甲酸根, 电氧化, 去合金化

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.

Key words: Pd-Cu alloy, electrocatalysts, formate ion, electrooxidation, dealloying effect

中图分类号:

O646

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（中英文）, 2014, 20(4): 343-348.

JIANG Kun, WANG Ye, LIN Tao, CAI Wen-bin*. Electrocatalytic Oxidation of Formate on Pd-Cu/C - Effect of Dealloying Pretreatment[J]. Journal of Electrochemistry, 2014, 20(4): 343-348.

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Pd-Cu/C上甲酸根电催化氧化及其去合金化效应

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

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