【作者】 沈庆峰； 杨显万； 司云森； 谢克强；

【Author】 Shen Qingfeng, Yang Xanwan, Si Yunseng, Xie Keqiang (Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, China)

【机构】 昆明理工大学材料与冶金工程学院；

【摘要】 用动电位扫描法测绘了硫酸溶液中软锰矿在石墨电极上的还原极化曲线,考查了液固比、温度、搅拌速率等因素对阴极过程的影响。结果表明软锰矿粒可以在阴极上还原,但所占比例较少,温度对软锰矿影响量大,软锰矿在石墨阴极还原的交换电流密度随温度的升高而增大,阴极极化的传递系数很小,添加铁离子有利于软锰矿的还原。更多还原

【Abstract】 The catholic polarization curves of pyrolusite on graphite electrode in H2SO4 solution were determined by using potential-dynamic scanning under various conditions. The results show that catholic reduction of pyrolusite can be conducted, but the reduction rate is low. The effects of temperature to pyrolusite reduction on the cathode are remarkable. The exchange current density increases with the increase of temperature. The presence of irons is favorable to reduce pyrolusite.更多还原