期刊
HYDROMETALLURGY
卷 182, 期 -, 页码 32-43出版社
ELSEVIER
DOI: 10.1016/j.hydromet.2018.10.009
关键词
Chalcopyrite; Glycine; Electrochemical dissolution; Leaching; Passivation; Raman; XPS
资金
- Research Training Scheme through Curtin Curtin University
Electrochemical experiments with a chalcopyrite rotating disk electrode were carried out in alkaline glycine solutions. This showed no apparent passivation behaviour during anodic dissolution that is observed in acid solutions. The current increased with applied potential from the open circuit potential with no resemblance to the passivation region seen in acid solutions. A loosely held porous layer developed on the surface consisting largely of iron oxyhydroxides that had a limited effect on the anodic current. Elemental sulfur and a disulfide species were detected using XPS and Raman spectroscopy but did not passivate the surface as has been proposed for acid solutions. The disulfide species is sometimes used to infer a metal deficient sulfide or polysulfide that is responsible for passivation but in this study it had no passivating influence. Current-potential curves showed features of a non-ideal semiconductor that were explained by charge transfer via surface states.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据