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Mathematical modelling of an enzymatic fuel cell with an air-breathing cathode

Mathematical modelling of an enzymatic fuel cell with an air-breathing cathode
Mathematical modelling of an enzymatic fuel cell with an air-breathing cathode
Multi-dimensional steady-state and dynamic models for an enzymatic fuel cell are developed. In the model system, the biocatalyst (glucose oxidase) is immobilized in a porous electrically conducting anode, while glucose and a mediator are supplied from a solution. A platinum air-breathing cathode and a Nafion membrane complete the cell unit. Detailed mass and charge balances are combined with a model for the ping-pong reaction mechanism in the anode, together with oxygen reduction in the cathode. The effects of enzyme oxidation by dissolved oxygen in the anode (a competing side reaction) are also included. The model is validated against experimental polarization and power curves, and the steady-state performance under different conditions is analyzed and discussed. The simulation results demonstrate some of the possible limitations of enzymatic fuel cells and provide insights into the spatial distributions of the reactants, potentials and current.
0013-4686
Osman, M.H.
b283fa97-bd35-46a8-b3a1-41c921da1951
Shah, A.A.
5c43ac37-c4a7-4256-88ef-8c427886b924
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
Osman, M.H.
b283fa97-bd35-46a8-b3a1-41c921da1951
Shah, A.A.
5c43ac37-c4a7-4256-88ef-8c427886b924
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2

Osman, M.H., Shah, A.A., Wills, Richard and Walsh, Frank (2013) Mathematical modelling of an enzymatic fuel cell with an air-breathing cathode. Electrochimica Acta. (doi:10.1016/j.electacta.2013.08.044).

Record type: Article

Abstract

Multi-dimensional steady-state and dynamic models for an enzymatic fuel cell are developed. In the model system, the biocatalyst (glucose oxidase) is immobilized in a porous electrically conducting anode, while glucose and a mediator are supplied from a solution. A platinum air-breathing cathode and a Nafion membrane complete the cell unit. Detailed mass and charge balances are combined with a model for the ping-pong reaction mechanism in the anode, together with oxygen reduction in the cathode. The effects of enzyme oxidation by dissolved oxygen in the anode (a competing side reaction) are also included. The model is validated against experimental polarization and power curves, and the steady-state performance under different conditions is analyzed and discussed. The simulation results demonstrate some of the possible limitations of enzymatic fuel cells and provide insights into the spatial distributions of the reactants, potentials and current.

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Published date: 1 December 2013

Identifiers

Local EPrints ID: 414192
URI: http://eprints.soton.ac.uk/id/eprint/414192
ISSN: 0013-4686
PURE UUID: 5f3f6aaf-9dae-4d7a-b5ad-1d7d12ac8fab
ORCID for Richard Wills: ORCID iD orcid.org/0000-0002-4805-7589

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Date deposited: 18 Sep 2017 16:31
Last modified: 03 May 2020 00:28

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