oa South African Journal of Chemistry - An electrochemical investigation of methanol oxidation on nickel hydroxide nanoparticles : research article
|Article Title||An electrochemical investigation of methanol oxidation on nickel hydroxide nanoparticles : research article|
|© Publisher:||South African Chemical Institute (SACI)|
|Journal||South African Journal of Chemistry|
|Affiliations||1 University of Mazandaran, Iran, 2 University of Mazandaran, Iran and 3 University of Mazandaran, Iran|
|Publication Date||Jan 2013|
|Pages||47 - 53|
|Keyword(s)||Cyclic voltammetry, Electrooxidation, Glassy carbon electrode, Methanol and Nickel hydroxide nanoparticles|
In this work, a nickel-modified glassy carbon electrode (GCE) was prepared using a potentiostatic method in 0.1 M acetate buffer solution at pH 4.0 containing 1.0 mM nickel 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 of methanol can occur at the modified electrode, whereas it is not observed at a bare GCE. The effect of potential sweep rates and methanol 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.
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