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Issue 10, 2013
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On the bio-electrocatalytic activity of tyrosinase for oxygen reduction reaction

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Abstract

The application of tyrosinase, a type 3 di-nuclear copper enzyme, as a catalyst for electrochemical oxygen reduction reaction (ORR) has been explored. During the reaction, O2 binds to the coupled type 3 copper atoms inside the redox site of tyrosinase and gets reduced to water. Besides the lack of the type 1 copper atom in its structure, unlike the multi-copper oxidases, tyrosinase exhibited direct electro-catalytic activity upon employing the electrode as a pseudo-substrate. The electrocatalytic activity of tyrosinase was further enhanced by using catechol/quinone as the redox shuttle for mediated electron transfer. This enhanced bio-electrocatalytic activity of tyrosinase for ORR has been reported in detail, which could open a new frontier in mediated enzyme reactions for biological fuel cell applications.

Graphical abstract: On the bio-electrocatalytic activity of tyrosinase for oxygen reduction reaction

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Publication details

The article was received on 18 Mar 2013, accepted on 25 Jun 2013 and first published on 25 Jun 2013


Article type: Communication
DOI: 10.1039/C3CY00180F
Citation: Catal. Sci. Technol., 2013,3, 2546-2549
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    On the bio-electrocatalytic activity of tyrosinase for oxygen reduction reaction

    Y. Umasankar and R. P. Ramasamy, Catal. Sci. Technol., 2013, 3, 2546
    DOI: 10.1039/C3CY00180F

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