title: Wiring laccase on covalently modified graphene: carbon nanotube assemblies for the direct bio-electrocatalytic reduction of oxygen.
abstract: Reduced graphene oxide (RGO) was covalently functionalized by the in situ generation and reduction of anthraquinone diazonium salt. Deposition on multi-wall carbon nanotube (MWCNT) electrodes prevents the aggregation of RGO nanosheets and allows the stable deposition of modified graphene, accompanied with excellent electron transfer properties. Laccases were immobilized on the nanostructured electrode by the interaction between the anthraquinone moiety and the laccase hydrophobic pocket located near the T1 copper center. The MWCNT/f-RGO electrode exhibits efficient bioelectrocatalytic oxygen reduction, with current densities of up to 0.9 mA cm(-2) .
authors.affiliation: Univ. Grenoble Alpes, CNRS DCM UMR 5250, 38000 Grenoble (France).
authors.forename: Noémie
authors.initials: N
authors.lastname: Lalaoui
authors.forename: Alan
authors.initials: A
authors.lastname: Le Goff
authors.forename: Michael
authors.initials: M
authors.lastname: Holzinger
authors.forename: Michel
authors.initials: M
authors.lastname: Mermoux
authors.forename: Serge
authors.initials: S
authors.lastname: Cosnier
mesh_terms: D000880:Anthraquinones / Q000737:chemistry*; D001674:Bioelectric Energy Sources; D002384:Catalysis; D004563:Electrochemistry; D004579:Electron Transport; D006108:Graphite / Q000737:chemistry*; D042845:Laccase / Q000737:chemistry* / Q000378:metabolism; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*
chemical_list: D000880:Anthraquinones; D037742:Nanotubes, Carbon; D006108:Graphite; D042845:Laccase; D010100:Oxygen
keywords: biofuel cells; carbon nanotubes; direct electron transfer; graphene; laccase