期刊
IONICS
卷 17, 期 3, 页码 209-216出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-011-0538-2
关键词
Manganese dioxide; Manganese chloride; Electrodeposition; Nanomaterials
资金
- National Natural Science Foundation of China [20807019, 40771102]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20070504053]
- National Undergraduate Innovative Test Program of China [200703]
Manganese dioxides were fabricated by electrodeposition from MnCl2, MgCl2/MnCl2, and HCl/MnCl2 aqueous solutions at 100 A degrees C, respectively. Oxidation behaviors of Mn(II) on titanium plate were studied by cyclic voltammetry. X-ray diffractometer, scanning electron microscopy, and BET measurements were used to characterize manganese dioxide crystal structures, micromorphologies, and specific surface area. The effects of electrolyte composition and potential on manganese dioxide crystal structure and micromorphology were investigated. Manganese dioxide structure type and micromorphology were controlled by adjusting electrolyte composition. gamma-MnO2 aggregates consisting of nanosheets were electrodeposited from 0.05 mol L-1 MnCl2 aqueous solution. Crystallinity and the size of gamma-MnO2 nanosheet were increased by adding Mg(II) into electrolyte. Nanosized rod-like alpha-MnO2 with higher specific surface area was prepared by adding 2.0 mol L-1 hydrochloric acid into manganese chloride solution.
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