纳米钯催化剂对甲醇的电催化氧化

doi:10.61558/2993-074X.2079

电化学（中英文） ›› 2011, Vol. 17 ›› Issue (1): 67-72. doi: 10.61558/2993-074X.2079

纳米钯催化剂对甲醇的电催化氧化

牛凤娟;易清风;

湖南科技大学化学化工学院;

收稿日期:2011-02-28 修回日期:2011-02-28 出版日期:2011-02-28 发布日期:2011-02-28

A Titanium-Supported Nanoporous Pd Electrocatalyst for Methanol Oxidation

NIU Feng-juan,YI Qing-feng

(School of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China

Received:2011-02-28 Revised:2011-02-28 Published:2011-02-28 Online:2011-02-28

摘要/Abstract

摘要： 采用水热法,以甲醛作还原剂还原Pd2+-EDTA络合物,制得钛基纳米钯颗粒电极(nanoPd/Ti).扫描电子显微镜(SEM)显示,纳米钯颗粒直径约为60 nm,形成三维立体网状结构.在碱性溶液中,循环伏安及交流阻抗测试分别表明:nanoPd/Ti电极对甲醇氧化有极高的阳极电流、较低的起始氧化电位和较强的抗CO毒化能力.在nanoPd/Ti电极上甲醇电氧化反应的阻抗值较低,增加甲醇浓度,电极阻抗更低.电极对甲醇氧化具有极好的电催化活性.

关键词: 纳米钯电极, 甲醇氧化, 电氧化活性

Abstract: Titanium-supported nanoporous palladium electrode(nanoPd /Ti) was prepared by a hydrothermal process in the presence of the ligand EDTA and using formaldehyde as reducing agent.SEM images showed that the size of Pd particles was about 60 nm and the Pd particles were connected with each other to form a three-dimensional network structure.Cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS) were applied to evaluate the electrocatalytic activity of the nanoPd/Ti electrode towards methanol oxidation in alkaline solution.CV results showed that the nanoPd /Ti electrode presented high anodic peak densities and a low onset potential for methanol oxidation.Also nanoPd /Ti electrode showed excellent CO tolerance during the oxidation of methanol.Nyquist and Bode plots of electrochemical impedance showed that methanol electro-oxidation on the nanoPd /Ti exhibited low impedance values,and that with the increase of methanol concentrations,the impedance value for methanol electrooxidation decreaseed,indicating the significantly high electroactivity of the prepared nanoporous Pd electrode for methanol oxidation.

Key words: nanoporous Pd electrodes, methanol oxidation, electro-oxidation activity

中图分类号:

O646.54

牛凤娟, 易清风, . 纳米钯催化剂对甲醇的电催化氧化[J]. 电化学（中英文）, 2011, 17(1): 67-72.

NIU Feng-juan, YI Qing-feng. A Titanium-Supported Nanoporous Pd Electrocatalyst for Methanol Oxidation[J]. Journal of Electrochemistry, 2011, 17(1): 67-72.

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纳米钯催化剂对甲醇的电催化氧化

A Titanium-Supported Nanoporous Pd Electrocatalyst for Methanol Oxidation

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