Sandwich-Type Enzymatic Fuel Cell Based on a New Electro-Conductive Material - Ion Jelly

Rui N. L. Carvalho, Rui M. Almeida, José J. G. Moura, Nuno T. Lourenço, Luís J. P. Fonseca, Cristina M. Cordas

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In the present work, Ion Jelly films based on 1-ethyl-3-methylimidazolium ethylsulfate, with incorporated redox proteins and enzymes were deposited on carbon screen-printed electrodes (SPEs), and their electrochemical characterization was attained. Ion Jelly synthesis was carried out simultaneously with protein incorporation in its structure, followed by a maturation step under controlled atmosphere (4 days at 4 °C and water activity (aw) of 0.76). The electrochemical response of the material was characterized, and a sandwich-type fuel cell configuration was subsequently built, consisting of two SPEs containing two independent Ion Jelly discs in the middle; one disc incorporated Desulfovibrio gigas cytochrome c3 and [NiFe]-hydrogenase, while the other disc contained aldehyde oxidoreductase, constituting the biocathode and bioanode of the cell, respectively. Cell voltage increased with time in the presence of benzaldehyde, in agreement with a successful electronic pathway across the cell and the concomitant aldehyde oxidoreductase enzymatic activity. In the cathodic side assays, hydrogenase showed catalytic activity towards H+ reduction to H2.

Original languageEnglish
Pages (from-to)6546-6552
Number of pages7
JournalChemistrySelect
Volume1
Issue number20
DOIs
Publication statusPublished - 1 Jan 2016

Keywords

  • Electron transport chain
  • Enzymatic fuel cells
  • Hydrogel
  • Ionic liquids

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