Improvements in direct borohydride fuel cells using three-dimensional electrodes
Improvements in direct borohydride fuel cells using three-dimensional electrodes
The oxidation of borohydride ions on three-dimensional electrodes such as vitreous carbon (RVC) coated with gold nanoparticles and silver porous sponge material was investigated. The RVC electrodes were covered with gold using PVD sputtering for different times of exposure. The open pore silver sponge electrode was prepared by the calcination of dextran or starch polymers, used as a framework, and silver nitrate mixtures between 400 and 600 °C. The porous silver was characterised by Scanning Electron Microscopy (SEM) and showed pore sizes between 1 and 20 ?m. The activity of these electrodes as anode catalysts for the direct oxidation of borohydride was evaluated by cyclic voltammetry in 0.02 mol dm?3 NaBH4 plus 3 mol dm?3 NaOH. The number electrons, the charge transfer coefficient and the homogeneous and kinetic rate constants were calculated and the values are comparable with those reported in the literature
148-154
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Kulak, A.
b5932a7d-a10a-4862-ac32-a7a1e08be88b
Williams, S.
762dd529-2acb-40b8-acf3-e3488eec8506
Merino-Jimenez, I.
257882c9-4369-457e-ab30-f2d4d044a261
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
July 2011
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Kulak, A.
b5932a7d-a10a-4862-ac32-a7a1e08be88b
Williams, S.
762dd529-2acb-40b8-acf3-e3488eec8506
Merino-Jimenez, I.
257882c9-4369-457e-ab30-f2d4d044a261
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Ponce de Leon, Carlos, Kulak, A., Williams, S., Merino-Jimenez, I. and Walsh, F.C.
(2011)
Improvements in direct borohydride fuel cells using three-dimensional electrodes.
Catalysis Today, 170 (1), .
(doi:10.1016/j.cattod.2011.03.010).
Abstract
The oxidation of borohydride ions on three-dimensional electrodes such as vitreous carbon (RVC) coated with gold nanoparticles and silver porous sponge material was investigated. The RVC electrodes were covered with gold using PVD sputtering for different times of exposure. The open pore silver sponge electrode was prepared by the calcination of dextran or starch polymers, used as a framework, and silver nitrate mixtures between 400 and 600 °C. The porous silver was characterised by Scanning Electron Microscopy (SEM) and showed pore sizes between 1 and 20 ?m. The activity of these electrodes as anode catalysts for the direct oxidation of borohydride was evaluated by cyclic voltammetry in 0.02 mol dm?3 NaBH4 plus 3 mol dm?3 NaOH. The number electrons, the charge transfer coefficient and the homogeneous and kinetic rate constants were calculated and the values are comparable with those reported in the literature
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Published date: July 2011
Organisations:
Engineering Mats & Surface Engineerg Gp, Engineering Science Unit
Identifiers
Local EPrints ID: 184977
URI: http://eprints.soton.ac.uk/id/eprint/184977
ISSN: 0920-5861
PURE UUID: 84413c5b-7d06-4016-bdca-c585d1458797
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Date deposited: 09 May 2011 12:54
Last modified: 15 Mar 2024 03:22
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Author:
A. Kulak
Author:
S. Williams
Author:
I. Merino-Jimenez
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