Electropolymerized manganese porphyrin/polypyrrole films as catalytic surfaces for the oxidation of nitric oxide

被引：103

作者：

Diab, N ^{[1
]}

Schuhmann, W ^{[1
]}

机构：

[1] Ruhr Univ Bochum, Lehrstuhl Analyt Chem AG Elektroanalyt & Sensor, D-44780 Bochum, Germany

来源：

ELECTROCHIMICA ACTA | 2001年 / 47卷 / 1-2期

关键词：

polypyrrole; manganese porphyrin; electropolymerization; pulse amperometry; nitric oxid; NO;

D O I：

10.1016/S0013-4686(01)00565-5

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A porphyrin-based NO sensor has been prepared using Mn(II)-meso-tetracarboxyphenylporphyrin linked via a spacer chain to a pyrrole unit, By means of electrochemically induced formation of a porphyrin/polypyrrole film on the microelectrode a suitable catalytic surface for NO oxidation could be obtained. The modified electrode displays excellent electrocatalytic activity for the oxidation of NO at similar to 720 mV versus Ag/AgCl. A Nafion membrane coating was used as charge-selective layer in order to diminish interferences by negatively charged ions, especially NO2-. The response of the microsensor for NO-oxidation was monitored in phosphate buffer using differential pulse voltammetry and constant-potential amperometry. The detection limit in the latter case has been determined to be 1 x 10(-7) M NO. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：265 / 273

页数：9

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