CeO2-Assisted Biocatalytic Nanostructures for Laccase-Based Biocathodes and Biofuel Cells

A hybrid CeO2-based biocatalytic nanostructure carrying catalytically active oxygen-rich nanoparticles is described as a general platform for laccase (Lac)-based biocathodes and biofuel cells. To design the bioelectrodes, the particles and the enzyme were deposited on reduced graphene or carbon nano...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2017-01, Vol.164 (9), p.G92-G98
Main Authors: Karimi, Anahita, Andreescu, Silvana
Format: Article
Language:English
Online Access:Get full text
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Summary:A hybrid CeO2-based biocatalytic nanostructure carrying catalytically active oxygen-rich nanoparticles is described as a general platform for laccase (Lac)-based biocathodes and biofuel cells. To design the bioelectrodes, the particles and the enzyme were deposited on reduced graphene or carbon nanotube-based buckypaper using conducting poly(3,4-ethylenedioxythiophene):poly-styrene-sulfonic acid (PEDOT:PSS). The use of CeO2 into the biocatalytic layer enhanced the bioelectrocatalytic reduction current and enabled functionality of the bioelectrode and biofuel cell in oxygen-limited conditions. These results open up new avenues for designing biointerfaces for protecting activity of immobilized enzymes and providing functionality in oxygen-limited environments. The hybrid nanostructure described in this work may be used as a general platform for the immobilization of other enzymes for a variety of biosensing, biofuel cells and bioelectronics applications.
ISSN:1945-7111
DOI:10.1149/2.0931709jes