Electrochemical sensor for formaldehyde based on Pt-Pd nanoparticles and a Nafion-modified glassy carbon electrode

被引：101

作者：

Zhou, Zhong-Liang ^{[1
]}

Kang, Tian-Fang ^{[1
]}

Zhang, Yan ^{[1
]}

Cheng, Shui-Yuan ^{[1
]}

机构：

[1] Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100022, Peoples R China

来源：

MICROCHIMICA ACTA | 2009年 / 164卷 / 1-2期

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

Platinum-palladium alloy; Nanoparticles; Formaldehyde; Electrocatalytic oxidation; ELECTROCATALYTIC REDUCTION; HYDROGEN-PEROXIDE; FORMIC-ACID; FUEL-CELLS; PLATINUM; AIR; SURFACE; FILMS; CHROMATOGRAPHY; FABRICATION;

D O I：

10.1007/s00604-008-0046-x

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel electrochemical sensor for the determination of formaldehyde is introduced based on electrodepositing nanostructured platinum-palladium alloy in Nafion film-coated glassy carbon electrode. Bimetallic Pt-Pd nanoparticles are found to be uniformly dispersed in Nafion film, as confirmed by scanning electron microscopic analysis. Energy dispersed X-ray analysis is used to characterize the composition of metal present in the nanoparticle-modified electrodes. The electrocatalytical behavior of the electrode is investigated by cyclic voltammetry and linear sweep voltammetry. Experimental results show that the electrode displays a remarked electrocatalytic activity for the oxidation of formaldehyde and exhibits a linear relationship in the range of 10 mu M to 1 mM, with a detection limit of 3 mu M in acidic solution. The low detection limit, wide linear range, and high sensitivity of the sensor make it valuable for further application.

引用

页码：133 / 138

页数：6

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