title: Supramolecular immobilization of laccase on carbon nanotube electrodes functionalized with (methylpyrenylaminomethyl)anthraquinone for direct electron reduction of oxygen.
abstract: An efficient way of immobilizing and wiring a large amount of laccase on non-covalently-functionalized multi-walled carbon nanotube (MWCNT) electrodes is reported. 1-(2-anthraquinonylaminomethyl)pyrene and 1-[bis(2-anthraquinonyl)aminomethyl]pyrene were synthesized and studied for their capability to non-covalently functionalize MWCNT electrodes and immobilize and orientate laccase on the nanostructured electrodes. This led to high-performance biocathodes for oxygen reduction by direct electron transfer with maximum current densities of (1±0.2) mA cm(-2). The performance of the resulting bioelectrodes could be doubled simply by using the bis-anthraquinone compound. The bioelectrodes show excellent stability over weeks and can thus be envisioned in enzymatic biofuel cells.
authors.affiliation: Département de Chimie Moléculaire, Université Joseph Fourier, Grenoble 1, 570 rue de la chimie, BP 53, 38041 Grenoble cedex 9, France.
authors.forename: Mariem
authors.initials: M
authors.lastname: Bourourou
authors.forename: Kamal
authors.initials: K
authors.lastname: Elouarzaki
authors.forename: Noémie
authors.initials: N
authors.lastname: Lalaoui
authors.forename: Charles
authors.initials: C
authors.lastname: Agnès
authors.forename: Alan
authors.initials: A
authors.lastname: Le Goff
authors.forename: Michael
authors.initials: M
authors.lastname: Holzinger
authors.forename: Abderrazak
authors.initials: A
authors.lastname: Maaref
authors.forename: Serge
authors.initials: S
authors.lastname: Cosnier
mesh_terms: D000880:Anthraquinones / Q000138:chemical synthesis* / Q000737:chemistry; D001674:Bioelectric Energy Sources; D004566:Electrodes; D004579:Electron Transport; D004583:Electrons; D004800:Enzymes, Immobilized / Q000737:chemistry*; D042845:Laccase / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D011721:Pyrenes / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: C585226:1-(2-anthraquinonylaminomethyl)pyrene; C585227:1-(bis(2-anthraquinonyl)aminomethyl)pyrene; D000880:Anthraquinones; D004800:Enzymes, Immobilized; D037742:Nanotubes, Carbon; D011721:Pyrenes; D042845:Laccase; D010100:Oxygen
keywords: electrochemistry; enzymes; immobilization; nanotubes; quinones