Sensitive electrochemical detection of oxalate at a positively charged boron-doped diamond surface

被引：27

作者：

Kondo, Takeshi ^{[1
]}

Niwano, Yu ^{[1
]}

Tamura, Akira ^{[1
]}

Ivandini, Tribidasari A. ^{[2
]}

Einaga, Yasuaki ^{[2
]}

Tryk, Donald A. ^{[3
]}

Fujishima, Akira ^{[4
]}

Kawai, Takeshi ^{[1
]}

机构：

[1] Tokyo Univ Sci, Fac Engn, Dept Ind Chem, Shinjuku Ku, Tokyo 1628601, Japan

[2] Keio Univ, Fac Sci & Technol, Dept Chem, Yokohama, Kanagawa 2238522, Japan

[3] Tokyo Metropolitan Univ, Fac Urban Environm Sci, Dept Appl Chem, Tokyo 1920397, Japan

[4] Kanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan

来源：

ELECTROANALYSIS | 2008年 / 20卷 / 14期

关键词：

boron-doped diamond electrode; oxalate; surface modification; allyltriethylammonium bromide; electrochemical detection;

D O I：

10.1002/elan.200804212

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Allyltriethylammonium bromide (ATAB) was covalently attached to the surface of hydrogen-terminated boron-doped diamond (BDD) thin films using a photochemical method to fabricate positively charged electrode surfaces. The anodic current for oxalate oxidation both in cyclic voltammetry and in flow-injection analysis with amperometry was found to be up to two times larger at ATAB-modified BDD (ATAB-BDD) than at an unmodified BDD electrode, which may be based on the electrostatic interaction between the oxalate anion and the electrode surface. In addition, the stability of the electrochemical detection of oxalate was improved at the ATAB-BDD electrode compared to the unmodified electrode.

引用

页码：1556 / 1564

页数：9

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