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

2007

January

ELECTROCHEMISTRY COMMUNICATIONS

Design and application of a magnetic field gradient electrode

Published

9

1

155

158

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. (c) 2006 Elsevier B.V. All rights reserved.

10.1016/j.elecom.2006.08.059