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An amorphous nanostructured hydrous manganese oxide (MnO 2 ·nH 2 O) coating was anodically deposited onto a graphite substrate from an aqueous MnSO 4 solution. Various deposition charges were employed to achieve different coating thickness. The capacitive characteristics of the as-grown MnO 2 coatings were evaluated in various neutral alkali metal chloride solutions...
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