Vertically aligned carbon nanotube film electrodes for bioelectrocatalytic dioxygen reduction

被引：30

作者：

Zloczewska, Adrianna ^{[1
]}

Joensson-Niedziolka, Martin ^{[1
]}

Rogalski, Jerzy ^{[2
]}

Opallo, Marcin ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland

[2] Marie Curie Sklodowska Univ, Dept Biochem, PL-20031 Lublin, Poland

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 11期

关键词：

Vertically aligned carbon nanotubes; Functionalised carbon nanotubes; Dioxygen reduction; Laccase; Zinc-oxygen battery; Biocathode; CHEMICAL-VAPOR-DEPOSITION; LARGE-SCALE SYNTHESIS; ELECTROCATALYTIC ACTIVITY; OXYGEN REDUCTION; BIOFUEL CELL; THIN-FILM; LACCASE; ELECTROCHEMISTRY; ARRAYS; GROWTH;

D O I：

10.1016/j.electacta.2011.02.021

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We have prepared vertically aligned carbon nanotube (VACNT) film electrodes for bioelectrocatalytic dioxygen reduction. The electrodes were prepared by a CNT-transfer technique attaching the as-grown VACNTs to an ITO electrode with a conductive CNT/epoxy glue. The VACNTs greatly enhance the active electrode area as shown by the substantial current increase of the slow electroreduction of hydrogen peroxide as well as the increase of the efficiency of the oxidation and reduction of the water-insoluble redox probe t-butylferrocene. Several methods for immobilisation of the multicopper enzyme laccase, both with and without mediator, were evaluated. Very high non-mediated catalytic dioxygen reduction current was measured using VACNTs functionalised with 1-pyrenesulfonic acid. The VACNT electrodes were successfully applied as cathode in a zinc-oxygen battery, reaching a power density of 275 mu W cm(-2) at 1.5 V with pyrene-functionalised VACNTs. and 115 mu W cm(-2) at 0.9 V with syringaldazine as a mediator in oxygen saturated buffer. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：3947 / 3953

页数：7

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