Biocatalytic fuel cells: A comparison of surface pre-treatments for anchoring biocatalytic redox films on electrode surfaces
Biocatalytic fuel cells: A comparison of surface pre-treatments for anchoring biocatalytic redox films on electrode surfaces
- Journal of Electroanalytical Chemistry, 626(1-2), p.111-115, 2009 .
Films of redox hydrogels containing co-immobilized biocatalysts on electrodes show promise as biosensors and in biocatalytic fuel cells, provided issues of film stability can be addressed. Here we evaluate the stability of these systems chemically tethered, using a diepoxide crosslinker, to electrodes previously pretreated to introduce surface amine groups. An osmium-based redox polymer, alone or combined with glucose oxidase or bilirubin oxidase, is tethered to gold substrates pre-treated with cysteamine or to graphite surfaces pre-treated by in situ generation and reduction of the diazonium salt from 1,4-phenylenediamine. After 48 h, graphite electrodes pre-treated to introduce the anchoring amine group retained up to 90 ± 3
DIAZONIUM SALT
SURFACE PRE-TREATMENT
REDOX POLYMER
OSMIUM
BIOFUEL CELL
BIOCATALYSIS
Films of redox hydrogels containing co-immobilized biocatalysts on electrodes show promise as biosensors and in biocatalytic fuel cells, provided issues of film stability can be addressed. Here we evaluate the stability of these systems chemically tethered, using a diepoxide crosslinker, to electrodes previously pretreated to introduce surface amine groups. An osmium-based redox polymer, alone or combined with glucose oxidase or bilirubin oxidase, is tethered to gold substrates pre-treated with cysteamine or to graphite surfaces pre-treated by in situ generation and reduction of the diazonium salt from 1,4-phenylenediamine. After 48 h, graphite electrodes pre-treated to introduce the anchoring amine group retained up to 90 ± 3
DIAZONIUM SALT
SURFACE PRE-TREATMENT
REDOX POLYMER
OSMIUM
BIOFUEL CELL
BIOCATALYSIS