Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/2868

TitleKinetics of direct and substrate-mediated electron transfer of versatile peroxidase-modified graphite electrodes
Author(s)Munteanu, Florentina-Daniela
Ruiz-Duenas, Francisco J.
T. Martinez, Angel
Paulo, Artur Cavaco
KeywordsBioelectrocatalysis
Versatile peroxidase
Graphite electrode
Heterogeneous electron transfer
Issue date2005
PublisherElsevier
JournalJournal of electroanalytical chemistry
Citation"Journal of electroanalytical chemistry". ISSN 0022-0728. 580:1 (June 2005) 35-40.
Abstract(s)Electron transfer (ET) of versatile peroxidase (VP) was studied in the bioelectrocatalytic reduction reaction of H2O2 at peroxidase- modified graphite electrodes to obtain additional information on the kinetic characteristics of this novel ligninolytic peroxidase. Rotating disk electrodes (RDE) experiments were performed at 0 V (vs. SCE) in two different buffers (tartrate buffer, pH 5.0; and citrate buffer, pH 3.0). From measurements of the mediated and mediatorless currents of H2O2 reduction at the RDE, the percentage of VP molecules involved in direct ET (≈55%) was calculated. The peroxidase-modified electrodes were used for determination of the donor substrates in RDE mode, and the results were interpreted in terms of catalytic efficiencies.
TypeArticle
URIhttp://hdl.handle.net/1822/2868
DOI10.1016/j.jelechem.2005.02.022
ISSN0022-0728
Peer-Reviewedyes
AccessOpen access
Appears in Collections:DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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