Optimization of the use of carbon paste electrodes (CPE) for electrochemical study of the chalcopyrite
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Data
2009-01-01
Autores
Horta, Daniela G. [UNESP]
Bevilaqua, Denise [UNESP]
Acciari, Heloisa Andréa [UNESP]
Garcia Júnior, Oswaldo[UNESP]
Benedetti, Assis Vicente [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Química
Resumo
The use of carbon paste electrodes (CPE) of mineral sulfides can be useful for electrochemical studies to overcome problems by using massive ones. Using CPE-chalcopyrite some variables were electrochemically evaluated. These variables were: (i) the atmosphere of preparation (air or argon) of CPE and elapsed time till its use; (ii) scan rate for voltammetric measurements and (iii) chalcopyrite concentration in the CPE. Based on cyclic voltammetry, open-circuit potential and electrochemical impedance results the recommendations are: oxygen-free atmosphere to prepare and kept the CPE until around two ours, scan rates from 10 to 40 mV s-1, and chalcopyrite concentrations > 20%.
Descrição
Palavras-chave
carbon paste electrodes (CPE), chalcopyrite, leaching
Como citar
Química Nova. Sociedade Brasileira de Química, v. 32, n. 7, p. 1734-1738, 2009.