Design and application of a magnetic field gradient electrode

N. B. Chaure; F. M.F. Rhen; J. Hilton; J. M.D. Coey

doi:10.1016/j.elecom.2006.08.059

Design and application of a magnetic field gradient electrode

N. B. Chaure, F. M.F. Rhen, J. Hilton, J. M.D. Coey

Trinity College Dublin

Research output: Contribution to journal › Article › peer-review

Abstract

A platinum coated electrode, which creates a magnetic field of 25 mT and a field gradient of order 10⁵ T m^-1 within 100 nm of the electrode surface is produced by embedding an array of CoPt nanowires in an alumina membrane. There is an enhancement by up to a factor of three for a model oxygen reduction reaction in an alkaline medium when the nanowires in the electrode are in a magnetized state. We suggest that the enhancement of the oxygen reduction current is associated with an increase of concentration of HO₂^- on the surface of the electrode by the magnetic field gradient.

Original language	English
Pages (from-to)	155-158
Number of pages	4
Journal	Electrochemistry Communications
Volume	9
Issue number	1
DOIs	https://doi.org/10.1016/j.elecom.2006.08.059
Publication status	Published - Jan 2007
Externally published	Yes

Keywords

CoPt
Magnetic field gradient
Oxygen reduction

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10.1016/j.elecom.2006.08.059

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author = "Chaure, {N. B.} and Rhen, {F. M.F.} and J. Hilton and Coey, {J. M.D.}",

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AU - Rhen, F. M.F.

AU - Hilton, J.

AU - Coey, J. M.D.

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AB - A platinum coated electrode, which creates a magnetic field of 25 mT and a field gradient of order 105 T m-1 within 100 nm of the electrode surface is produced by embedding an array of CoPt nanowires in an alumina membrane. There is an enhancement by up to a factor of three for a model oxygen reduction reaction in an alkaline medium when the nanowires in the electrode are in a magnetized state. We suggest that the enhancement of the oxygen reduction current is associated with an increase of concentration of HO2- on the surface of the electrode by the magnetic field gradient.

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KW - Oxygen reduction

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JO - Electrochemistry Communications

JF - Electrochemistry Communications

IS - 1

ER -

Design and application of a magnetic field gradient electrode

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Keywords

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