Optimization of the use of carbon paste electrodes (CPE) for electrochemical study of the chalcopyrite

Química Nova

Bevilaqua, Denise¹  Horta, Daniela G.¹  Universidade Estadual Paulista, Araraquara, Brasil¹  Benedetti, Assis V.¹  Acciari, Heloísa A.¹  Garcia Júnior, Oswaldo¹ 

关键词: carbon paste electrodes (CPE);    chalcopyrite;    leaching.;   

DOI  :  10.1590/S0100-40422009000700010

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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%.

【 授权许可】

Unknown