Journal
ELECTROANALYSIS
Volume 22, Issue 5, Pages 491-500Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.200900523
Keywords
Nickel microparticles; Boron doped diamond; Electrocatalysis; Alcohol oxidation; Fuel cells
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Funding
- EPSRC
- Asylum Research UK Ltd
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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(NO3)(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.
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