Journal
ELECTROCHIMICA ACTA
Volume 318, Issue -, Pages 922-930Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.06.140
Keywords
Biofuel cell; Microfluidic; Finger-powered fluidics; Vulcan carbon black; Paper-like electrodes
Categories
Funding
- FCT [PD/BD/109660/2015]
- European Union (FEDER funds) [POCI/01/0145/FEDER/007265]
- Norte Portugal Regional Coordination and Development Commission (CCDR-N) NORTE2020/Portugal 2020 [NORTE-01-145-FEDER-000024]
- National Funds (FCT/MEC, Fundacao para a Ciencia e Tecnologia and Ministerio da Educacao e Ciencia) under the Partnership Agreement PT2020 [UID/QUI/50006/2013]
- FSE [PD/BD/109660/2015]
- Fundação para a Ciência e a Tecnologia [PD/BD/109660/2015] Funding Source: FCT
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In this study the development of a biofuel cell for potential application in microfluidics is described. The biocatalysts support is produced through vacuum-filtration of a Vulcan carbon black suspension resulting in flexible, paper-like electrodes. The glucose oxidase bioanode was assembled using an enzyme precipitate coating procedure whereas the biocathode was implemented by attaching bilirubin oxidase enzyme onto the carbon black surface via a pyrene intermediate. The bioelectrodes were first characterized by voltammetry and by chronoamperometry on their sensing ability towards the respective substrates, namely glucose and oxygen. Finally, bioanode and biocathode were integrated in a singlecompartment of a heterogeneous poly (methyl methacrylate) - polydimethylsiloxane microfluidic platform and the power density produced was assessed. In 10 mM glucose solution at pH 7.0, the biofuel cell showed an open circuit potential (OCP) of 0.43 V and a maximum power density of about 28 mu Wcm(-2) at 0.24 V. Also we demonstrate here the viability of human propelled fluidics by introducing in the microfluidic device a finger-pressure mechanism. (C) 2019 Elsevier Ltd. All rights reserved.
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