Crosslinked redox polymer enzyme electrodes containing carbon nanotubes for high and stable glucose oxidation current

Domhnall MacAodha, Maria Luisa Ferrer, Peter Ó Conghaile, Paul Kavanagh, Dónal Leech*

*Corresponding author for this work

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Co-immobilisation approaches for preparation of glucose-oxidising films of [Os(2,2′-bipyridine)2(poly-vinylimidazole)10Cl] and glucose oxidase on glassy carbon electrodes are compared. Electrodes prepared by crosslinking using glutaraldehyde vapour, without and with a NaBH4 reduction, provide higher glucose oxidation current than those prepared using a well-established diepoxide method. Addition of multi walled carbon nanotubes to the film deposition solutions produces an enhanced glucose oxidation current density of 5 mA cm-2 at 0.35 V vs. Ag/AgCl, whilst improving the operational stability of the current signal. Carbon nanotube, glutaraldehyde vapour crosslinked, films on electrodes, reduced by NaBH4, retain 77% of initial catalytic current over 24 hours of continuous amperometric testing in a 37 °C, 50 mM phosphate buffer solution containing 150 mM NaCl and 100 mM glucose. Potential application of this approach to implantable enzymatic biofuel cells is demonstrated by production of glucose oxidation currents, under pseudo-physiological conditions, using mediating films with lower redox potentials. This journal is

Original languageEnglish
Pages (from-to)14667-14672
Number of pages6
Journal Physical Chemistry Chemical Physics
Volume14
Issue number42
DOIs
Publication statusPublished - 14 Nov 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)

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