Comparison of the spinels Co3O4 and NiCo2O4 as bifunctional oxygen catalysts in alkaline media
Comparison of the spinels Co3O4 and NiCo2O4 as bifunctional oxygen catalysts in alkaline media
Data from experiments with both rotating disc electrodes (RDEs) and gas diffusion electrodes (GDEs) are used to investigate the properties of the spinels, Co3O4 and NiCo2O4, as bifunctional oxygen electrocatalysts. Emphasis is placed on catalyst compositions and electrode structures free of carbon. Oxygen evolution and reduction occur at surfaces where the transition metals are in different oxidation states but the surface can be repeatedly cycled between these two states without significant change. It is shown that carbon-free, NiCo2O4 catalysed GDEs can be fabricated using structures based on stainless steel cloth or nickel foam. Those based on nickel foam can be cycled extensively and allow both O2 evolution and reduction at current densities up to 100 mA cm?2.
oxygen evolution, oxygen reduction, alkaline, spinel, gas diffusion electrode
286-293
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Li, Xiaohong
9c4a40b0-c567-476b-b698-ae51b3f13dbd
Price, Stephen W.T.
42cf4966-68f0-443a-a933-d198f3dc60c2
Russell, Andrea E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Sönmez, Turgut
e2e3fafa-ed15-433d-828a-aada1382f379
Thompson, Stephen J.
46677911-01d9-478e-ad98-87ac37cd56a6
10 January 2016
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Li, Xiaohong
9c4a40b0-c567-476b-b698-ae51b3f13dbd
Price, Stephen W.T.
42cf4966-68f0-443a-a933-d198f3dc60c2
Russell, Andrea E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Sönmez, Turgut
e2e3fafa-ed15-433d-828a-aada1382f379
Thompson, Stephen J.
46677911-01d9-478e-ad98-87ac37cd56a6
Pletcher, Derek, Li, Xiaohong, Price, Stephen W.T., Russell, Andrea E., Sönmez, Turgut and Thompson, Stephen J.
(2016)
Comparison of the spinels Co3O4 and NiCo2O4 as bifunctional oxygen catalysts in alkaline media.
Electrochimica Acta, .
(doi:10.1016/j.electacta.2015.10.020).
Abstract
Data from experiments with both rotating disc electrodes (RDEs) and gas diffusion electrodes (GDEs) are used to investigate the properties of the spinels, Co3O4 and NiCo2O4, as bifunctional oxygen electrocatalysts. Emphasis is placed on catalyst compositions and electrode structures free of carbon. Oxygen evolution and reduction occur at surfaces where the transition metals are in different oxidation states but the surface can be repeatedly cycled between these two states without significant change. It is shown that carbon-free, NiCo2O4 catalysed GDEs can be fabricated using structures based on stainless steel cloth or nickel foam. Those based on nickel foam can be cycled extensively and allow both O2 evolution and reduction at current densities up to 100 mA cm?2.
Text
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- Accepted Manuscript
More information
Accepted/In Press date: 5 October 2015
e-pub ahead of print date: 23 October 2015
Published date: 10 January 2016
Keywords:
oxygen evolution, oxygen reduction, alkaline, spinel, gas diffusion electrode
Organisations:
Faculty of Natural and Environmental Sciences, Electrochemistry
Identifiers
Local EPrints ID: 383694
URI: http://eprints.soton.ac.uk/id/eprint/383694
ISSN: 0013-4686
PURE UUID: 05af8fbd-0623-40fb-800f-7cf818c06a79
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Date deposited: 09 Nov 2015 16:29
Last modified: 15 Mar 2024 02:58
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Contributors
Author:
Xiaohong Li
Author:
Stephen W.T. Price
Author:
Turgut Sönmez
Author:
Stephen J. Thompson
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