【作者】 陈步明； 郭忠诚； 杨显万；

【Author】 Chen Burning,Guo Zhongcheng~*,Yang Xianwan(Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China)

【机构】 昆明理工大学冶金与能源学院；

【摘要】 根据热力学数据,通过计算绘制出Mn-H₂O系电位-pH图,分析了酸性条件下电沉积二氧化铅-二氧化锰的可行性。研究表叫:温度变化的影响对二氧化锰电沉积的电位比二氧化铅的大;当[Mn²⁺]>[H⁺]²时,溶液中会先沉积出二氧化锰,而不是析出氧气,即使溶液中有二氧化铅存在,也还是优先沉积二氧化锰;通过低屯势沉积纯二氧化锰,随着[Mn²⁺]消耗,产生的二氧化铅缓慢诱导二氧化锰的沉积过电位增加来达到最终的共沉积,能得到二氧化锰利二氧化铅复合镀层。更多还原

【Abstract】 In order to learn electrodepositing PbO₂-MnO₂ more clearly in the aqueous solution,by a number of thermodynamic data and electrochemistry calculating formulas,the E-PH diagrams of Pb-H₂O and Mn-H₂O system were calculated and drawn,and the feasibility of the thermodynamic analysis for electrodepositing PbO₂-MnO₂ from the solution was discussed. The results showed that the potential of electrodeposited MnO₂ was changed more obviously than that ofβ-PbO₂ by increasing the temperature in acid system.On the basis of standard redox potentials,anodic deposition of MnO₂ was easier than deposition of PbO₂.The smooth and compact PbO₂-MnO₂ layer could be got by reducing the current density and potential of the electrodeposition.更多还原