Journal
ELECTROCHIMICA ACTA
Volume 55, Issue 28, Pages 8744-8750Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.07.101
Keywords
Functionalised carbon nanotubes; Sol-gel; Bilirubin oxidase; Dioxygen reduction; Zinc-oxygen battery
Categories
Funding
- European Union [POIG 01 01 02-289 00-008/08]
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We have prepared electrodes for bioelectrocatalytic dioxygen reduction modified with single-walled carbon nanotubes non-covalently functionalised with 1-pyrenesulfonic acid 1-pyrenecarboxylic acid 1-pyrenebutyric acid or 1-pyrenemethylamine The nanotubes were immobilised in a hydrophilic or hydrophobic silicate matrix on tin-doped indium oxide and bilirubin oxidase was either adsorbed from solution or co-immobilised with the nanotubes in the silicate matrix In the cases where the oxidase was absorbed from solution the charge of the functionalised nanotubes was decisive for the efficiency of the bioelectrocatalytic reduction of oxygen very low electrocatalytic current was measured with positively charged pyrene functionalisation In the case of co-immobilised enzyme the sign of the charge of the functional group has no effect on the catalytic efficiency of the modified electrodes Rotating disk experiments show that the main limitation of the catalytic current is the supply of oxygen to the enzyme The PSA-functionalised SWCNT electrodes were used as a cathode in zinc-oxygen battery (C) 2010 Elsevier Ltd All rights reserved
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