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Enzymatic Biofuel Cells based on Protective Hydrophobic Carbon Paste Electrodes: Towards Epidermal Bioenergy Harvesting in the Acidic Sweat Environment

Abstract

The operation of wearable epidermal biofuel cells devices is prone to rapid irreversible deactivation effects under the dynamic sweat pH changes from neutral to acidic. We demonstrate that the encapsulation of lactate-oxidase (LOx) within a hydrophobic protective carbon-paste anode imparts remarkable acid-protection and high stability during dynamically changing pH conditions to allow the BFC to continue harvest the lactate bioenergy even after long exposures to acidic conditions. The unique power-recovery ability of the carbon-paste BFC after its failure in harsh pH is attributed to the protective action of the non-polar paste environment.

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Supplementary files

Article information


Submitted
09 Dec 2019
Accepted
13 Jan 2020
First published
13 Jan 2020

Chem. Commun., 2020, Accepted Manuscript
Article type
Communication

Enzymatic Biofuel Cells based on Protective Hydrophobic Carbon Paste Electrodes: Towards Epidermal Bioenergy Harvesting in the Acidic Sweat Environment

J. Sempionatto, P. A. Raymundo-Pereira, N. F. B. Azeredo, A. Neidert de Loyola e Silva, L. Angnes and J. Wang, Chem. Commun., 2020, Accepted Manuscript , DOI: 10.1039/C9CC09533K

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