Electrocatalytic oxidation of urea by nanostructured nickel/cobalt hydroxide electrodes |
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Authors: | M. Vidotti,R.P. Salvador,L.H. Dall&rsquo Antonia |
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Affiliation: | a Instituto de Química, Universidade de São Paulo, C.P. 26077, 05513-970 São Paulo, SP, Brazil b Departamento de Química, Universidade Estadual de Londrina, C.P. 6001, 86051-580 Londrina, PR, Brazil |
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Abstract: | The present paper describes the catalytic oxidation of urea performed by nickel hydroxide and nickel/cobalt hydroxide modified electrodes by using both electrodeposited films and nanoparticles. The incorporation of Co foreign atoms leads to a slight increase in sensitivity besides the shift in redox process, avoiding the oxygen reaction. Nanostructured Ni80Co20(OH)2 was synthesized by sonochemical route producing 5 nm diameter particles characterized by high-resolution transmission electron microscopy (HRTEM) being immobilized onto electrode by using the electrostatic Layer-by-layer technique, yielding attractive modified electrodes for sensor development. |
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Keywords: | Urea sensing Nickel hydroxide Cobalt Additives Nanoparticles |
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