Gold nanoparticles as electronic bridges for laccase-based biocathodes

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Gold nanoparticles as electronic bridges for laccase-based biocathodes

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dc.contributor.author Gutierrez-Sanchez, Cristina
dc.contributor.author Pita, Marcos
dc.contributor.author Vaz-Dominguez, Cristina
dc.contributor.author Shleev, Sergey
dc.contributor.author De Lacey, Antonio
dc.date.accessioned 2012-11-08T08:38:29Z
dc.date.available 2012-11-08T08:38:29Z
dc.date.issued 2012 en_US
dc.identifier.citation 17212-17220 en_US
dc.identifier.issn 0002-7863 en_US
dc.identifier.uri http://hdl.handle.net/2043/14302
dc.description.abstract Direct electron transfer (DET) reactions between redox enzymes and electrodes can be maximized by oriented immobilization of the enzyme mols. onto an electroactive surface modified with functionalized Au nanoparticles (AuNPs). Here, the authors present such strategy for obtaining a DET-based laccase (Lc) cathode for O2 electroredn. at low overpotentials. The stable nanostructured enzymic electrode is based on the step-by-step covalent attachment of AuNPs and Lc mols. to porous graphite electrodes using the diazonium salt redn. strategy. Oriented immobilization of the enzyme mols. on adequately functionalized AuNPs allows establishing very fast DET with the electrode via their Cu T1 site. The measured electrocatalytic waves of O2 redn. can be deconvoluted into two contributions. The one at lower overpotentials corresponds to immobilized Lc mols. that are efficiently wired by the AuNPs with a heterogeneous electron transfer rate const. k0 » 400 s-1. en_US
dc.language.iso eng en_US
dc.publisher American Chemical Society en_US
dc.subject.classification Sciences en_US
dc.title Gold nanoparticles as electronic bridges for laccase-based biocathodes en_US
dc.type Article, peer reviewed scientific en_US
dc.contributor.department Malmö University. Faculty of Health and Society en
dc.identifier.doi http://dx.doi.org/10.1021/ja307308j en_US
dc.subject.srsc Research Subject Categories::NATURAL SCIENCES en_US
dc.relation.ispartofpublication Journal of the American Chemical Society;41
dc.relation.ispartofpublicationvolume 134 en_US
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