Author/Authors :
Tkach, Volodymyr V Chernivtsi National University , de Oliveira, Sílvio C Universidade Federal de Mato Grosso do Sul , Anaissi, Fauze J Laboratório de Materiais e Compostos Inorgânicos - Departamento de Química - Universidade Estadual do Centro-Oeste - Setor de Ciências Exatas e da Terra , Ojani, Reza University of Mazandaran , Páramo-García, Ulises División de Estudios de Posgrado e Investigación Instituto Tecnológico de Ciudad Madero - Calle Juventino Rosas y Jesús Urueta , Yelenich, Olga Chernivtsi National University , Yagodynets, Petro I Chernivtsi National University
Abstract :
The mechanism for the electroanalytical function of the cobalt oxy-hydroxycompound in the electrochemical oxidation of oxalic acid was suggested. The mathematical model, describing this process, has been developed and analyzed by means of steady-state stability theory and bifurcation analysis. The behavior of the system was compared with the behavior of analogous systems. The steady-state stability requirements and oscillatory and monotonic instability conditions have been obtained. These instabilities may be caused by surface and electrochemical factor. The oscillation frequency and amplitude are pH-dependent, and the first parameter grows with pH. The pH-range of electroanalytical sensing efficiency was also derived and it is corresponding to moderate alkaline solutions.
Keywords :
Cobalt oxide-hydroxide , Electrocatalytic oxidation , Mechanistic analysis , Oscillatory behavior , Stable steady-state
