Investigation on Electrochemical Behavior of PbO2 and MnO2 Co-deposition
WANG Jiong1,2, XU Ruidong1,2, YU Bohao1, HAN Sha1, HE Shiwei1, CHEN Buming1
1 Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093; 2 State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming 650093
Abstract: The influences of concentration of Mn(NO3)2, HNO3, Pb(NO3)2 and solution temperature on PbO2-MnO2 co-de-position were studied by cyclic voltammetry using rotating disk electrode, and the theoretical optimum conditions of the PbO2 and MnO2 co-deposition were obtained. The experiments concerning the effects of rotation rate of the electrode on the co-deposition process of PbO2 and MnO2 indicate that the behavior of PbO2 and MnO2 co-deposition process is mainly determined by the electrochemical process. Scanning electron microscopy (SEM) was applied to observe the surface morphology of PbO2-MnO2 layer and the results confirmed the spherical structure of the PbO2-MnO2 layer. Besides, a ternary-phase-mixed crystal phase of α-MnO2, α-PbO2 and β-PbO2 in the PbO2-MnO2 layer was detected by X-ray diffraction (XRD) technology.
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2017, Vol. 31 
