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Lookup NU author(s): Professor Eileen Yu, Emeritus Professor Keith Scott, Dr Robert Reeve, Dr Lianxi Yang, Ruth Allen
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Characterisation of a platinised Ti mesh electrode, prepared by electrodeposition of Pt, by methanol oxidation has been studied over a range of NaOH and methanol concentrations using cyclic voltammetry (CV), quasi-steady-state polarisation, and electrochemical impedance spectroscopy (EIS). The activity of methanol oxidation in aqueous alkaline systems increased with pH or OH species coverage on the electrode surface. A reaction order of close to 0.5 was obtained for both NaOH and methanol in NaOH solutions indicating that adsorption of methanol and OH- on the platinised electrode follows Termkin isotherm. In the high potential region, a poisoning effect was observed at methanol/[OH-] concentration ratio greater than 1, which could have arisen from an excess of methanol at the electrode surface and/or depletion of OH- at the electrode surface. The methanol oxidation behaviour conforms with that on Pt electrodes suggesting a promising new method of preparing electrodes for fuel cells. © 2004 Elsevier Ltd. All rights reserved.
Author(s): Yu EH, Scott K, Reeve RW, Yang L, Allen RG
Publication type: Article
Publication status: Published
Journal: Electrochimica Acta
Year: 2004
Volume: 49
Issue: 15
Pages: 2443-2452
ISSN (print): 0013-4686
ISSN (electronic): 1873-3859
Publisher: Pergamon
URL: http://dx.doi.org/10.1016/j.electacta.2004.01.022
DOI: 10.1016/j.electacta.2004.01.022
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