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Renewable New Copper Complex Bulk‐Modified Carbon Paste Electrode: Preparation, Electrochemistry, and Electrocatalysis
Author(s) -
Wang Xiuli,
Zhao Haiyan,
Lin Hongyan,
Liu Guocheng,
Fang Jiani,
Chen Baokuan
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.200704146
Subject(s) - electrocatalyst , copper , electrochemistry , inorganic chemistry , redox , chemistry , bromate , hydrogen peroxide , carbon paste electrode , materials science , electrode , nuclear chemistry , cyclic voltammetry , organic chemistry , bromide
A conductive carbon paste electrode (CPE) comprised of a new copper‐complex of [Cu 2 (Dpq) 2 (Ac) 2 (H 2 O) 2 ](ClO 4 ) 2 ⋅H 2 O (Dpq=dipyrido[3,2‐d : 2′,3′‐f]quinoxaline, Ac=acetate) and carbon powder, was fabricated by the direct mixing method. The electrochemical behavior and electrocatalysis of the new copper‐complex modified CPE (Cu‐CPE) have been studied in detail. Cyclic voltammograms showed that the Cu‐CPE had a favorable electrochemical response of a reversible redox couple of Cu(II)/Cu(I). The Cu‐CPE showed good electrocatalytic activity toward the reduction of the bromate, nitrite and hydrogen peroxide. The electrocatalytic reduction peak current of KBrO 3 , KNO 2 and H 2 O 2 showed a linear dependent on their concentrations. All of the results revealed that the Cu‐CPE had a good reproducibility, remarkable long term stability and especially good surface renewability by simple mechanical polishing in the event of surface fouling, which is important for practical application.