Conversion of porous PbO2 layers through galvanic displacement reaction with Mn2 + ions |
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| Institution: | 1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;2. Kunming Hendera Science and Technology Co., Ltd., Kunming 650022, China;3. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;4. State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization, Kunming University of Science and Technology, Kunming 650093, China;5. Faculty of Science, Kunming University of Science and Technology, Kunming 650093, China;1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China;2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China;3. Chemical Engineering Department, The Petroleum Institute, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates |
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| Abstract: | The galvanic exchange between Mn2 + ions and electrodeposited porous PbO2 was studied to produce a porous oxide whose lower conductivity prevented its direct oxygen bubble-templated anodic deposition. Immersion of PbO2 layers in acid acetate solutions of Mn2 + led to the formation of amorphous MnOx shell onto PbO2. Due to its amorphous nature, MnOx could not be proved to be MnO2 by XRD. However, MnOx was cathodically stripped at the same potential as MnO2. The deposition of the MnOx shell onto PbO2 enhanced the capacity of the porous electrodes. |
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