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Oxidation of the borohydride Ion at silver nanoparticles on a glassy carbon electrode (GCE) using pulsed potential techniques

Record type: Article

Direct oxidation borohydride fuel cells are very attractive energy conversion devices. Silver has been reported as one of the few materials which can catalyze an 8-electron oxidation. Potential step amperometric pulse techniques to synthesize nanostructured silver material on flat glassy carbon electrodes is reported and significant differences with bulk silver deposit have been observed. The oxidation of borohydride ion on the silver particles occurs at -0.025 V vs. SCE and the potential decreases towards negative values at longer cycle times. The oxidation current also decreases with the number of cycles, suggesting that the silver active sites become partially blocked by oxidation products of borohydride. The electroactive area per unit electrode area of silver was relatively low for particles deposited using potential step amperometric techniques on glassy carbon (0.002 cm2 per cm-2) compared with the area found at a polycrystalline silver electrode (0.103 cm2 per cm-2)

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Citation

Hernández-Ramírez, V.A, Alatorre-Ordaz, A, Yepez-Murrieta, M.L., Ibanez, J.G., Ponce de Leon, C. and Walsh, F.C (2009) Oxidation of the borohydride Ion at silver nanoparticles on a glassy carbon electrode (GCE) using pulsed potential techniques ECS Transactions, 20, (1), pp. 211-225. (doi:10.1149/1.3268389).

More information

Published date: 5 June 2009
Keywords: borohydride, energy generation, silver electrodes
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 69892
URI: http://eprints.soton.ac.uk/id/eprint/69892
ISSN: 1938-5862
PURE UUID: a632bc23-e571-44ad-bf9d-8b5a88571004

Catalogue record

Date deposited: 09 Dec 2009
Last modified: 19 Jul 2017 00:05

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Contributors

Author: V.A Hernández-Ramírez
Author: A Alatorre-Ordaz
Author: M.L. Yepez-Murrieta
Author: J.G. Ibanez
Author: F.C Walsh

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