The University of Southampton
University of Southampton Institutional Repository

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

Oxidation of the borohydride Ion at silver nanoparticles on a glassy carbon electrode (GCE) using pulsed potential techniques
Oxidation of the borohydride Ion at silver nanoparticles on a glassy carbon electrode (GCE) using pulsed potential techniques
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)
borohydride, energy generation, silver electrodes
1938-5862
211-225
Hernández-Ramírez, V.A
0da54b13-18fe-4bda-a618-8978703d0dc8
Alatorre-Ordaz, A
4bdbe504-3ab9-4949-b2d4-60b36ed67345
Yepez-Murrieta, M.L.
80edaa6a-0beb-4db2-a645-04799104c8e3
Ibanez, J.G.
f60a1d13-9e3f-431d-913a-cc5215e6810e
Ponce de Leon, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Walsh, F.C
309528e7-062e-439b-af40-9309bc91efb2
Hernández-Ramírez, V.A
0da54b13-18fe-4bda-a618-8978703d0dc8
Alatorre-Ordaz, A
4bdbe504-3ab9-4949-b2d4-60b36ed67345
Yepez-Murrieta, M.L.
80edaa6a-0beb-4db2-a645-04799104c8e3
Ibanez, J.G.
f60a1d13-9e3f-431d-913a-cc5215e6810e
Ponce de Leon, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Walsh, F.C
309528e7-062e-439b-af40-9309bc91efb2

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), 211-225. (doi:10.1149/1.3268389).

Record type: Article

Abstract

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)

Text
MES-0172R1.pdf - Version of Record
Download (1MB)

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
ORCID for C. Ponce de Leon: ORCID iD orcid.org/0000-0002-1907-5913

Catalogue record

Date deposited: 09 Dec 2009
Last modified: 14 Mar 2024 02:50

Export record

Altmetrics

Contributors

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

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×