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The determination of methanol using an electrolytically fabricated nickel microparticle modified boron doped diamond electrode

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<mark>Journal publication date</mark>03/2010
<mark>Journal</mark>Electroanalysis
Issue number5
Volume22
Number of pages10
Pages (from-to)491-500
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A nickel modified boron doped diamond (Ni-BDD) electrode and nickel foil electrode were used in the determination of methanol in alkaline solutions. The Ni-BDD electrode was electrodeposited from a 1 mM Ni(NO(3))(2) solution (pH 5), followed by repeat cycling in KOH. Subsequent analysis utilised the Ni(OH)(2)/NiOOH redox couple to electrocatalyse the oxidation of methanol. Methanol was determined to limits of 0.3 mM with a sensitivity of 110 nA/mM at the Ni-BDD electrode. The foil electrode was less sensitive achieving a limit of 1.6 mM and sensitivity of 27 nA/mM. SEM analysis of the electrodes found the Ni-BDD to be modified by a quasi-random microparticle array.