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

Quimica nova

Bevilaqua, Denise¹  Horta, Daniela G.¹  Benedetti, Assis V.¹  Acciari, Heloísa A.¹  Garcia Júnior, Oswaldo¹ 

[1] Universidade Estadual Paulista, Araraquara, Brasil

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 carbonpaste electrodes (CPE) of mineral sulfides can be useful for electrochemicalstudies to overcome problems by using massive ones. Using CPE-chalcopyrite somevariables were electrochemically evaluated. These variables were: (i) the atmosphereof preparation (air or argon) of CPE and elapsed time till its use; (ii) scanrate for voltammetric measurements and (iii) chalcopyrite concentration in theCPE. Based on cyclic voltammetry, open-circuit potential and electrochemicalimpedance results the recommendations are: oxygen-free atmosphere to prepareand kept the CPE until around two ours, scan rates from 10 to 40 mV s-1,and chalcopyrite concentrations > 20%.

【 授权许可】

CC BY