Direct electron transfer catalyzed by bilirubin oxidase for air breathing gas-diffusion electrodes

被引：84

作者：

Gupta, Gautam ^{[1
]}

Lau, Carolin ^{[1
]}

Rajendran, Vijaykumar ^{[1
]}

Colon, Frisia ^{[1
]}

Branch, Brittany ^{[1
]}

Ivnitski, Dmitri ^{[1
]}

Atanassov, Plamen ^{[1
]}

机构：

[1] Univ New Mexico, Dept Chem & Nucl Engn, Ctr Emerging Energy Technol, Albuquerque, NM 87131 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2011年 / 13卷 / 03期

关键词：

Bilirubin oxidase; Direct electron transfer; Oxygen reduction; Biofuel cell; Gas-diffusion electrode; BIOFUEL CELLS; DIRECT ELECTROCHEMISTRY; OXYGEN REDUCTION; COPPER CENTERS; REDOX POLYMER; LACCASE; BIOELECTROCATALYSIS; CATHODE; WATER; POTENTIALS;

D O I：

10.1016/j.elecom.2010.12.024

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A gas-diffusion electrode based on hydrophobized carbon black composite for enhanced enzymatic oxygen reduction is presented for the possible application as a biocathode in enzymatic fuel cells. Immobilized bilirubin oxidase (BOD) from Myrothecium verrucaria reduces oxygen in a 4-electron mechanism, as shown by Tafel kinetics and shows evidence of direct electron transfer. Under air-breathing conditions the galvanostatic polarization results in an open circuit potential of + 0.65 V (vs. Ag/AgCl, pH 7) and in + 0.5 Vat an applied current density of 0.35 mA cm(-2) which is 3 times higher compared to aqueous oxygen supply. (C) 2011 Elsevier BM. All rights reserved.

引用

页码：247 / 249

页数：3

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