An Electrochemical Investigation of Methanol Oxidation on Nickel Hydroxide Nanoparticles

In this work, a nickel-modified glassy carbon electrode (GCE) was prepared using a potentiostatic method in 0.1Macetate 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.KEYWORDS Cyclic voltammetry, electrooxidation, glassy carbon electrode, methanol, nickel hydroxide nanoparticles

The mathematical description of the electrosynthesis of composites of oxy-hydroxycompounds cobalt with polypyrrole overooxidazed

The electrosynthesis of the composite with of the overoxidized polypyrrole with cobalt oxy-hydroxide in strongly acidic media has been described mathematically, using linear stability theory and bifurcation analysis. The steadystates stability conditions and oscillatory and monotonic instability requirements have been described too. The system´s behavior was compared with behavior of other systems with overoxidation, electropolymerization of heterocyclic compounds and electrosynthesis of the cobalt oxy-hydroxides

The mechanism for the electrooxidation of procarbazine pharmaceutical preparation in alkaline media and its mathematical description

The mechanism for the electrooxidation of procarbazine in alkaline media has been proposed. The process is realized completely on the electrode surface and is adsorption-controlled. The oscillatory behavior in this case is more probable, than for neutral media and may be caused by influences of electrochemical oxidation and salt dissolution from the electrode surface

THE MECHANISTIC INVESTIGATION FOR THE POSSIBILITY OF THE USE OF CoO(OH) AS AN ELECTRODE MODIFIER FOR ANALYSIS OF COMPLEX-FORMING SUBSTANCES

The possibility of the use of cobalt (III) oxyhydroxide as an electrode modifier for electrochemical detection of complex-forming compounds was evaluated by means of mechanistic investigation. The corresponding mathematical model has been developed and analyzed, by means of linear stability theory and bifurcation analysis. It was detected, that the steady-state stability topological region for this case is wider, than for cases, in which the complex-forming compound interferes the analysis of another compound. The possibility of oscillatory and monotonic instabilities for this system has also been evaluate

The mathematical stability study for the system of the CoO(OH) – overoxidized polypyrrole composite synthesis in the presence of fluor ions

The potentiostatic synthesis of CoO(OH) – Overoxidized polypyrrole composite in the presence of fluor ions has been investigated mathematically. The corresponding mathematical model was described and analyzed by means of linear stability theory and bifurcation analysis. The steady-state stability requirements, like also oscillatory and monotonic instability conditions are derived.Mongolian Journal of Chemistry 16 (42), 2015, 13-1

THE MATHEMATICAL INVESTIGATION FOR THE MECHANISM OF THE ELECTROCHEMICAL OXIDATION OF PHENOLIC COMPOUNDS OVER CoO(OH) IN ALKALINE SOLUTION

The mechanism for the electrochemical oxidation of phenolic compounds over cobalt(III)oxyhydroxide was suggested and mathematically analyzed, by means of linear stability theory and bifurcation analysis. The influence of pH on steady-state stability and reaction control has been investigated

THE MECHANISM OF ANODIC ELECTROOXIDATION OF GABAPENTINE AND ITS MATHEMATICAL EVALUATION

The mechanism for the electrooxidation of gabapentine in aqueous solutions has been suggested. and analyzed electrochemically and mathematically, by using linear stability theory and bifurcation analysis. The steady-state stability requirements, like also oscillatory and monotonic instability conditions, have been detected. The system tends to the similarity with another, describing the modification of conducting polymer

Математическое описание «политиофенового парадокса» для потенциостатической электрополимеризации электрохимически модифицированных тиофенов

The phenomenon of "polythiophene paradox" for insoluble polythiophenes based on electrochemically modified monomers has been described theoretically. The corresponding mathematical model was examined using linear theory of stability and bifurcation analysis. Stability conditions of steady state, monotonic and oscillatory instabilities have also been obtained.Явление «политиофенового парадокса» для нерастворимых политиофенов на основе электрохимически модифицированных мономеров было описано теоретически. Соответствующая математическая модель была рассмотрена с помощью линейной теории устойчивости и бифуркационного анализа. Условия устойчивости стационарного состояния, монотонной и автоколебательной неустойчивостей также были получены

Mathematical description of «polythiophene paradox» for potentiostatic electropolymerization of electrochemically modified thiophenes

The phenomenon of "polythiophene paradox" for insoluble polythiophenes based on electrochemically modified monomers has been described theoretically. The corresponding mathematical model was examined using linear theory of stability and bifurcation analysis. Stability conditions of steady state, monotonic and oscillatory instabilities have also been obtained