Optimization of the use of carbon paste electrodes (CPE) for electrochemical study of the chalcopyrite
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Undergraduate course
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Sociedade Brasileira de Química
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Article
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Acesso aberto
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Abstract
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%.
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Language
English
Citation
Química Nova. Sociedade Brasileira de Química, v. 32, n. 7, p. 1734-1738, 2009.
