CeO2-Assisted Biocatalytic Nanostructures for Laccase-Based Biocathodes and Biofuel Cells. Issue 9 (11th July 2017)

• Record Type: Journal Article
• Authors: Karimi, Anahita; Andreescu, Silvana
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 9(2017)
• Page Start: G92
• Page End: G98
• Publication Date: 2017-07-11
• Subjects: electrodes -- nanostructure; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0931709jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : 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.