The electrochemical behavior of some amino acids was investigated on cobalt hydroxide nanoparticles
modified glassy carbon (CHM–GC) electrode in alkaline solution. The process of oxidation and its kinetics
were established by using cyclic voltammetry, chronoamperometry techniques, and steady-state polarization
measurements. The results revealed that cobalt hydroxide promotes the rate of oxidation by
increasing the peak current, so these bimolecular reactions are oxidized at lower potentials. Cyclic voltammograms
and chronoamperometry indicate a catalytic EC0 mechanism to be operative with electrogeneration
of Co(IV) as the electrochemical process. Also, the process is diffusion controlled and the
current–time responses follow Cottrellian behavior. This result was confirmed by steady-state measurements.
The rate constants of the catalytic oxidation of amino acids and the electron transfer coefficients
are reported