Author/Authors :
Tkach, Volodymyr V Chernivtsi National University , Oliveira, Sílvio C. de Universidade Federal de Mato Grosso do Sul , Anaissi, Fauze J Rua Simeão Varela de Sá - Laboratório de Materiais e Compostos Inorgânicos - Departamento de Química - Setor de Ciências Exatas e da Terra - Universidade Estadual do Centro-Oeste , Ojani, Reza University of Mazandaran , Neves, Virgínia S Instituto Federal de Educação - Ciência e Tecnologia da Bahia , Espínola, Michel O. Galeano Facultad de Ciencias Químicas - Universidad Nacional de Asunción, , Yagodynets, Petro I Chernivtsi National University
Abstract :
The possibility of the use of cobalt(III) oxyhydroxyde as an electrode modifier for hydrazine detection has been investigated. The mechanism for the electrochemical oxidation of hydrazine over CoO(OH) has been suggested, and the correspondent mathematical model was developed and analyzed. The optimal pH for electroanalytical efficiency of the system is between 7 and 12. Strongly alkaline media promote the direct hydrazine oxidation and may destroy the modifying material. The oscillatory and monotonic instabilities´ possibility has been also investigated. These instabilities may be caused by surface and electrochemical factors.
Keywords :
Hydrazine , Electroanalysis , Cobalt(III) oxyhydroxide , Electrooxydation , Stable steady-state
