Kinetics of electrocatalytic oxidation of formaldehyde on a nickel porphyrin-based glassy carbon electrode

被引:70
作者
Ciszewski, A [1 ]
Milczarek, G [1 ]
机构
[1] Poznan Univ Technol, Inst Chem & Appl Electrochem, PL-60965 Poznan, Poland
来源
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1999年 / 469卷 / 01期
关键词
electropolymerisation; formaldehyde; modified electrode; rotating disc;
D O I
10.1016/S0022-0728(99)00180-1
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Electrocatalytic oxidation of formaldehyde on a glassy carbon modified with electropolymerised films derived from tetrakis(4-hydroxy-3-methoxyphenyl)porphinato nickel(II) (THMPPNi(II)) was studied in 0.1 M NaOH on stationary and rotating electrodes by cyclic voltammetry and rotating disc amperometry, respectively. The data from rotating disc experiments were analysed according to Albery-Hillman theory. The findings showed that the poly-THMPPNi(II) behaves as an efficient electrocacalyst for the oxidation of formaldehyde with the cross-exchange reaction occurring throughout the layer at a low concentration of formaldehyde and for a thin modifier, i.e. the mediating process corresponds to the Lk kinetic case, with a change over to the LEk regime at higher substrate concentration or for thicker films. (C) 1999 Elsevier Science S.A. All rights reserved.
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页码:18 / 26
页数:9
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