金属化聚邻甲苯胺膜修饰电极的性能研究

电化学（中英文） ›› 2001, Vol. 7 ›› Issue (2): 161-166.

金属化聚邻甲苯胺膜修饰电极的性能研究

戴李宗,许一婷,吴辉煌

厦门大学化学化工学院固体表面物理化学国家重点实验室!福建厦门361005,厦门大学化学化工学院固体表面物理化学国家重点实验室!福建厦门361005,厦门大学化学化工学院固体表面物理化学国家重点实验室!福建厦门361005

收稿日期:2001-05-28 修回日期:2001-05-28 出版日期:2001-05-28 发布日期:2001-05-28

Properties of Metallized Poly-o-toluidide Membrane Modified Electrode

DAI Li_zong *,XU Yi_ting,WU Hui_huang

(Coll. of Chem. and Chem. Engin.,Xiamen Univ.,State Key Lab. for Phy. Chem. of Solid Surfaces,Xiamen 361005, China

Received:2001-05-28 Revised:2001-05-28 Published:2001-05-28 Online:2001-05-28

摘要/Abstract

摘要： 在聚邻甲苯胺 (POT)膜修饰电极上用电化学法沉积Pt微粒 ,由SEM与XRD表征其表面形态与晶面取向 ,同时研究异丙醇在金属化POT膜电极上的氧化行为 .结果表明 ,Pt在POT膜上的沉积呈现晶面择优取向的现象 ,况且POT质子掺杂后 ,由于电化学活性增强 ,影响了沉积铂微粒的尺寸和粒径分布 .异丙醇的电氧化可发生在POT的电化学活性区 ,当电位大于 0 .70V(SCE)时 ,POT不再呈氧化还原活性 ,异丙醇的电氧化主要在铂微粒上进行 .聚合物不仅作为铂微粒的载体而且自身参加反应 ,这种微异相催化体系需用新的模型描述

关键词: 聚邻甲苯胺, Pt电沉积, 异丙醇电氧化, 化学修饰电极

Abstract: The platinum particles were electrodeposited on poly(o_toluidide),POT,modified electrode,and the surface configuration and crystal orientation of Pt particles were investigated by SEM and XRD.At the same time the oxidation of isopropanol on platinized POT modified electrode was studied.The results indicate that Pt particles deposite towards preferred_orientation;moreover the increase in polymer electroactivity due to proton doping affects the dimension and graininess of deposited Pt particles.At the metallized polymer electrode the oxidation of isopropanol can occur in POT electroactive potential region,however at the more positive than 0.70 V (SCE) potential where POT loses redox activity the electro_oxidation mainly occurrs on Pt particles.It follows that the polymer not only behaves as the support of Pt particles but also participates in the reaction. Such a “microheterogeneous catalysis system" needs to be described by a new model.

Key words: Poly_o_toluidide, Electrodeposition of Pt, Electro_oxidation of isopropanol, Cheically modified electrodes

中图分类号:

O646

戴李宗,许一婷,吴辉煌. 金属化聚邻甲苯胺膜修饰电极的性能研究[J]. 电化学（中英文）, 2001, 7(2): 161-166.

DAI Li_zong *,XU Yi_ting,WU Hui_huang . Properties of Metallized Poly-o-toluidide Membrane Modified Electrode[J]. Journal of Electrochemistry, 2001, 7(2): 161-166.

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链接本文: https://electrochem.xmu.edu.cn/CN/

https://electrochem.xmu.edu.cn/CN/Y2001/V7/I2/161

参考文献

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