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
收藏
页码：247 / 249
页数：3
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