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Issue 42, 2012
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Crosslinked redox polymer enzyme electrodes containing carbon nanotubes for high and stable glucose oxidation current

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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.

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

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Publication details

The article was received on 21 Jun 2012, accepted on 24 Aug 2012, published on 24 Aug 2012 and first published online on 24 Aug 2012


Article type: Paper
DOI: 10.1039/C2CP42089A
Citation: Phys. Chem. Chem. Phys., 2012,14, 14667-14672
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    Crosslinked redox polymer enzyme electrodes containing carbon nanotubes for high and stable glucose oxidation current

    D. MacAodha, M. L. Ferrer, P. Ó. Conghaile, P. Kavanagh and D. Leech, Phys. Chem. Chem. Phys., 2012, 14, 14667
    DOI: 10.1039/C2CP42089A

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