Direct electron transfer and electrocatalysis of hemoglobin adsorbed onto electrodeposited mesoporous tungsten oxide

被引：126

作者：

Feng, JJ ^{[1
]}

Xu, JJ ^{[1
]}

Chen, HY ^{[1
]}

机构：

[1] Nanjing Univ, Key Lab Analyt Chem Life Sci, Dept Chem, Nanjing 210093, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2006年 / 8卷 / 01期

基金：

中国国家自然科学基金;

关键词：

hemoglobin; mesoporous WO3; electrodeposition; direct electron transfer; electrocatalysis; sensors;

D O I：

10.1016/j.elecom.2005.10.029

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A novel hemoglobin (Hb) electrode has been presented through adsorbed Hb onto mesoporous tungsten oxide via one-step electro-deposition. Positions of Soret absorption band showed Hb retained its natural configuration on the resulting films. Electrochemical impedance spectroscopy and cyclic voltammetry were employed to study the electrochemical behavior of adsorbed Hb. The immobilized Hb showed a pair of stable and well-defined peaks at about -284 and -174 mV at 100 mV s(-1) in pH 6.0 buffers and displayed excel lent electrocatalytical responses to the reduction of H2O2, NO2- and trichloroacetic acid. The presence Of meso-WO3 film greatly enhances the protein loadings, accelerates interfacial electron transfer and improves thermal stability of the adsorbed protein. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：77 / 82

页数：6

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