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Sensitive Electrochemical Detection of Oxalate at a Positively Charged Boron‐Doped Diamond Surface
Author(s) -
Kondo Takeshi,
Niwano Yu,
Tamura Akira,
Ivandini Tribidasari A.,
Einaga Yasuaki,
Tryk Donald A.,
Fujishima Akira,
Kawai Takeshi
Publication year - 2008
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200804212
Subject(s) - electrode , oxalate , cyclic voltammetry , amperometry , diamond , electrochemistry , inorganic chemistry , materials science , bromide , anode , chemistry , composite material
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.