CATALYTIC-OXIDATION OF REDUCED NICOTINAMIDE ADENINE-DINUCLEOTIDE AT A MICROBAND GOLD ELECTRODE MODIFIED WITH NICKEL HEXACYANOFERRATE

被引：88

作者：

CAI, CX ^{[1
]}

JU, HX ^{[1
]}

CHEN, HY ^{[1
]}

机构：

[1] NANJING UNIV,DEPT CHEM,NANJING 210093,PEOPLES R CHINA

来源：

ANALYTICA CHIMICA ACTA | 1995年 / 310卷 / 01期

关键词：

CATALYTIC METHODS; MICROELECTRODES; ELECTROCATALYTIC OXIDATION; NADH; NICKEL HEXACYANOFERRATE;

D O I：

10.1016/0003-2670(95)00097-J

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Nickel hexacyanoferrate films have been deposited on the surface of a microband gold electrode by cyclic voltammetry. Cyclic voltammograms of the resulting nickel hexacyanoferrate films indicate the presence of a couple of redox peaks which correspond to the hexacyanoferrate(II/III) redox couple. The nickel hexacyanoferrate modified microband gold electrode shows an excellent electrocatalytic activity for oxidation of reduced nicotinamide adenine dinucleotide (NADH) in phosphate buffer solution (pH 7.0), with an overpotential ca. 340 mV lower than that of the bare electrode. The steady-state current increases linearly with NADH concentration in the range of 0.5-8.0 mmol/l. The catalytic rate constant of the modified electrode for the oxidation of NADH is determined using a rotating disk electrode. The further experimental results show that the rate constant decreases with increasing NADH concentration. The mechanism of the oxidation of NADH catalyzed by the nickel hexacyanoferrate modified gold electrode is discussed.

引用

页码：145 / 151

页数：7

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