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- Title
An Electrochemical Investigation of Methanol Oxidation on Nickel Hydroxide Nanoparticles.
- Authors
Raoof, Jahan Bakhsh; Ojani, Reza; Hosseini, Sayed Reza
- Abstract
In thiswork, a nickel-modified glassy carbon electrode (GCE)was prepared using a potentiostaticmethod in 0.1Macetate buffer solution at pH 4.0 containing 1.0 mMnickel nitrate. Nickel hydroxide nanoparticles were prepared using consecutive potential scanning in 0.1 M NaOH solution. The as-prepared catalyst was characterized by field emission scanning electron microscopy and electrochemical methods. Electrochemical characterization exhibited stable redox behaviour of the Ni(III)/Ni(II) couple. Cyclic voltammetric experiments showed that electrocatalytic oxidation ofmethanol can occur at themodified electrode,whereas it is not observed at a bareGCE. The effect of potential sweep rates andmethanol concentration on its electrochemical behaviour was studied. The rate constant (k) for the chemical reaction between methanol and catalytic centres has been evaluated by chronoamperometry. In addition, long-term stability of the modified electrode was investigated by electrochemical methods.
- Subjects
OXIDATION of methanol; OXIDATION of chemical alcohols; NANOPARTICLES; ELECTROCHEMICAL analysis; CYCLIC voltammetry
- Publication
South African Journal of Chemistry, 2013, Vol 66, p47
- ISSN
0379-4350
- Publication type
Article