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Lookup NU author(s): Professor Eileen Yu,
Emeritus Professor Keith Scott,
Dr Robert Reeve,
Dr Lianxi Yang,
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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
ISSN (print): 0013-4686
ISSN (electronic): 1873-3859
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