Oxygen electroreduction catalysed by laccase wired to gold nanoparticles via the trinuclear copper cluster

Marius Dagys; Audrius Laurynėnas; Dalius Ratautas; Juozas Kulys; Regina Vidžiūnaitė; Martynas Talaikis; Gediminas Niaura; Liucija Marcinkevičienė; Rolandas Meškys; Sergey Shleev

doi:10.1039/C6EE02232D

Oxygen electroreduction catalysed by laccase wired to gold nanoparticles via the trinuclear copper cluster†

Marius Dagys,

‡*^a Audrius Laurynėnas,‡^ab Dalius Ratautas,‡^ab Juozas Kulys,^a Regina Vidžiūnaitė,^a Martynas Talaikis,^a Gediminas Niaura,^a Liucija Marcinkevičienė,^a Rolandas Meškys^a and Sergey Shleev*^cd

Author affiliations

* Corresponding authors

^a Institute of Biochemistry, Vilnius University, Saulėtekio al. 7, Vilnius, Lithuania
E-mail: marius.dagys@bchi.vu.lt

^b Faculty of Fundamental Sciences, Vilnius Gediminas Technical University, Saulėtekio al. 11, Vilnius, Lithuania

^c Malmö University, Jan Waldenströmsgata 25, Malmö, Sweden
E-mail: sergey.sleev@mah.se

^d Kurchatov NBICS Centre, National Research Centre “Kurchatov Institute”, Akademika Kurchatova pl. 1, 123 182 Moscow, Russia

Abstract

Specific wiring of biocatalysts par excellence, viz. redox enzymes, to an electrode can be exploited in the fabrication of high-performance bioelectronic devices. Here we report oxygen electroreduction catalysed by Didymocrea sp. J6 laccase wired to gold nanoparticles via the trinuclear copper cluster. Bypassing the intramolecular electron transfer, which under certain conditions is the rate-limiting step of oxygen bioelectroreduction, has resulted in the fabrication of a high current density biocathode based on high-redox-potential laccase, which is able to operate in electrolytes with a broad pH range in the presence of high fluoride concentrations.

Energy & Environmental Science

Oxygen electroreduction catalysed by laccase wired to gold nanoparticles via the trinuclear copper cluster†

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