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Electrodeposition of platinum on titanium felt in a rectangular channel flow cell

Electrodeposition of platinum on titanium felt in a rectangular channel flow cell
Electrodeposition of platinum on titanium felt in a rectangular channel flow cell
Highly porous platinised titanium substrates are attractive electrode materials for industrial electrochemical processing and electrochemical energy storage. The electrodeposition of platinum on titanium felt was carried out in a divided, rectangular channel flow cell from an alkaline bath without additives. The morphology and spatial distribution of the platinum deposits in the porous material were analysed using SEM and EDS microscopy in addition to X-ray computed tomography (CT). The electroplated surface area was estimated from the charge transfer current ratio for Ce(IV) reduction and related to a theoretical electrosorbed hydrogen monolayer surface area. The platinised titanium felt showed a significant enhancement of active surface area in comparison to conventional electrode materials. Although platinum was present throughout the porous electrode, CT revealed heterogeneous deposits accumulating in regions near the membrane (during electrodeposition), as a result of the potential distribution in the felt material and flowing electrolyte. Uniform platinum coatings are possible on thin titanium felt under 200 µm thick, by either potentiostatic or galvanostatic electrodeposition
0013-4651
D1-D10
Arenas, Luis F.
6e7e3d10-2aab-4fc3-a6d4-63a6614d0403
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Boardman, Richard P.
5818d677-5732-4e8a-a342-7164dbb10df1
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
Arenas, Luis F.
6e7e3d10-2aab-4fc3-a6d4-63a6614d0403
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Boardman, Richard P.
5818d677-5732-4e8a-a342-7164dbb10df1
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2

Arenas, Luis F., Ponce de Leon, Carlos, Boardman, Richard P. and Walsh, Frank C. (2016) Electrodeposition of platinum on titanium felt in a rectangular channel flow cell. Journal of the Electrochemical Society, 164 (2), D1-D10. (doi:10.1149/2.0651702jes).

Record type: Article

Abstract

Highly porous platinised titanium substrates are attractive electrode materials for industrial electrochemical processing and electrochemical energy storage. The electrodeposition of platinum on titanium felt was carried out in a divided, rectangular channel flow cell from an alkaline bath without additives. The morphology and spatial distribution of the platinum deposits in the porous material were analysed using SEM and EDS microscopy in addition to X-ray computed tomography (CT). The electroplated surface area was estimated from the charge transfer current ratio for Ce(IV) reduction and related to a theoretical electrosorbed hydrogen monolayer surface area. The platinised titanium felt showed a significant enhancement of active surface area in comparison to conventional electrode materials. Although platinum was present throughout the porous electrode, CT revealed heterogeneous deposits accumulating in regions near the membrane (during electrodeposition), as a result of the potential distribution in the felt material and flowing electrolyte. Uniform platinum coatings are possible on thin titanium felt under 200 µm thick, by either potentiostatic or galvanostatic electrodeposition

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Accepted/In Press date: 6 December 2016
e-pub ahead of print date: 17 December 2016
Published date: 17 December 2016
Organisations: Energy Technology Group

Identifiers

Local EPrints ID: 403799
URI: https://eprints.soton.ac.uk/id/eprint/403799
ISSN: 0013-4651
PURE UUID: d0b6ab44-b913-4d59-aa7a-41396e174106
ORCID for Carlos Ponce de Leon: ORCID iD orcid.org/0000-0002-1907-5913

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Date deposited: 12 Dec 2016 08:48
Last modified: 15 Aug 2019 00:44

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