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  • 1. Dagys, Marius
    et al.
    Haberska, Karolina
    Shleev, Sergey
    Malmö högskola, Faculty of Health and Society (HS).
    Arnebrant, Thomas
    Malmö högskola, Faculty of Health and Society (HS).
    Kulys, Juozas
    Ruzgas, Tautgirdas
    Malmö högskola, Faculty of Health and Society (HS).
    Laccase-gold nanoparticle assisted bioelectrocatalytic reduction of oxygen2010In: Electrochemistry communications, ISSN 1388-2481, E-ISSN 1873-1902, Vol. 12, no 7, p. 933-935Article in journal (Refereed)
    Abstract [en]

    It was found that homogeneous activity of Trametes hirsuta laccase is considerably diminished in the presence of gold nanoparticles (Au-NPs). Heterogeneous electron transfer studies revealed that Au-NPs facilitate direct electron transfer (DET) between the T1 copper site of the laccase and the surface of Au-NP modified electrodes. DET was characterized by the standard heterogeneous ET constant of 0.5 +/- 0.6 s(-1) at Au-NPs with an average diameter of 50 nm. As a consequence of this a well pronounced DET based bioelectrocatalytic oxygen reduction with current densities of 5-30 mu A cm(-2) has been achieved at the laccase-Au-NP modified electrodes.

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