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黄铁矿在氯化钴中的电化学氧化机理研究

  • 作者:
  • 李栢庄|毛王彬|唐家华|李佳蕊|顾云贵|何琳|张炎
  • 作者单位:
  • 昆明理工大学理学院|昆明理工大学理学院|昆明理工大学理学院|昆明理工大学理学院|昆明理工大学理学院|昆明理工大学理学院|昆明理工大学理学院
  • 基金项目:

  • 中国博士后科学基金面上项目(2019M663577);昆明理工大学理学院2021—2022学年本科教学改革课题(13052021023)
  • 详细信息:

  • 作者简介:
  • 李栢庄(2001—),男,湖南长沙人,大学本科,研究方向为黄铁矿表面氧化机理;昆明市呈贡大学城景明南路727号,昆明理工大学理学院,650500;E-mail:2997054677@qq.com
  • 通讯作者:
  • E-mail:zhangyan_ecnu@163.com,13764751439
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Mechanism of electrochemical oxidation of pyrite in cobalt chloride

  • English Author:
  • Faculty of Science,Kunming University of Science and Technology|Faculty of Science,Kunming University of Science and Technology|Faculty of Science,Kunming University of Science and Technology|Faculty of Science,Kunming University of Science and Technology|Faculty of Science,Kunming University of Science and Technology|Faculty of Science,Kunming University of Science and Technology|Faculty of Science,Kunming University of Science and Technology
  • Unit:
  • 摘要
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  • 参考文献

摘要:

以镶嵌有黄铁矿的石墨棒为工作电极,利用开路电位、循环伏安、Tafel曲线和电化学阻抗谱等电化学手段,从电化学的角度对黄铁矿在不同浓度CoCl2溶液和5 mmol/L CoCl2溶液浓度下不同电位的氧化过程进行了探讨。结果表明:在pH=1.0、CoCl2浓度9 mmol/L溶液中黄铁矿最易被腐蚀;在pH=1.0、CoCl2浓度为5 mmol/L、电位为0.4~0.8 V的条件下,黄铁矿的氧化能力先降低后升高且在0.6 V时达到最弱,而且在高电位时黄铁矿氧化能力要强于低电位。

关键词:

黄铁矿;氧化机理;电化学;氯化钴;防腐

Abstract:

Taking the graphite carbon rod with pyrite embedded as the working electrode,the oxidation process of pyrite in CoCl2 solutions of varying concentrations and the 5 mmol/L CoCl2 solutions at different potentials was discussed from the perspective of electrochemistry by using electrochemical means such as open circuit potential,cyclic voltammetry,Tafel curve,electrochemical impedance spectroscopy.The results showed that pyrite is most likely to be corroded in 9 mmol/L CoCl2 solutions under the conditions of pH=1.0;under the conditions of pH=1.0,CoCl2 concentration of 5 mmol/L and a potential range of 0.4-0.8 V,the oxidation capacity of pyrite first decreases and then increases,and reaches the weakest at 0.6 V,and the oxidation capacity of pyrite at  higher potentials is stronger than that at lower potentials.

Keywords:

pyrite;oxidation mechanism;electrochemistry;cobalt chloride;anti-corrosion