Molybdophosphoric acid based nickel catalysts as bifunctional oxygen electrodes in alkaline media
Molybdophosphoric acid based nickel catalysts as bifunctional oxygen electrodes in alkaline media
An air-breathing electrode was fabricated using a catalyst combination of nickel nano-powder and molybdophosphoric acid (H3PMo12O40) immobilised in a Nafion® based ink. The first investigation of the use of H3PMo12O40, a heteropolyacid (HPA), as an oxygen evolution catalyst and its application in an alkaline media is presented. Incorporating molybdophosphoric acid with nickel nano-powder resulted in more than a 650 mV reduction in potential difference between the oxygen evolution and reduction reactions at a current density of 44 mA cm? 2 when compared with electrodes made with the nickel nanopowder alone. The electrodes showed good stability and are potentially suitable for applications such as water electrolysis, unitised fuel cells and secondary metal–air batteries.
174-176
Wills, R.G.A.
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Kourasi, M.
d4b0deec-138e-457a-a893-b2f5f5c5f727
Shah, A.A.
5c43ac37-c4a7-4256-88ef-8c427886b924
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
August 2012
Wills, R.G.A.
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Kourasi, M.
d4b0deec-138e-457a-a893-b2f5f5c5f727
Shah, A.A.
5c43ac37-c4a7-4256-88ef-8c427886b924
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Wills, R.G.A., Kourasi, M., Shah, A.A. and Walsh, F.C.
(2012)
Molybdophosphoric acid based nickel catalysts as bifunctional oxygen electrodes in alkaline media.
Electrochemistry Communications, 22, .
(doi:10.1016/j.elecom.2012.06.024).
Abstract
An air-breathing electrode was fabricated using a catalyst combination of nickel nano-powder and molybdophosphoric acid (H3PMo12O40) immobilised in a Nafion® based ink. The first investigation of the use of H3PMo12O40, a heteropolyacid (HPA), as an oxygen evolution catalyst and its application in an alkaline media is presented. Incorporating molybdophosphoric acid with nickel nano-powder resulted in more than a 650 mV reduction in potential difference between the oxygen evolution and reduction reactions at a current density of 44 mA cm? 2 when compared with electrodes made with the nickel nanopowder alone. The electrodes showed good stability and are potentially suitable for applications such as water electrolysis, unitised fuel cells and secondary metal–air batteries.
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e-pub ahead of print date: June 2012
Published date: August 2012
Organisations:
Engineering Science Unit
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Local EPrints ID: 340410
URI: http://eprints.soton.ac.uk/id/eprint/340410
ISSN: 1388-2481
PURE UUID: 471bddb7-9833-47b2-9d64-d6876ba0e971
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Date deposited: 21 Jun 2012 09:59
Last modified: 15 Mar 2024 03:17
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Author:
M. Kourasi
Author:
A.A. Shah
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