エレクトロクロミックなマンガン酸化物薄膜の電解析出

抄録

Electrochromic manganese dioxide thin films have been electrodeposited on optically transparent electrodes (OTE) from an aqueous solution of manganse (II) sulfate. Brown MnO₂ thin film on the OTE glass is electrochemically reduced to a lower valence state, which is almost colorless, by the reaction.
MnO₂+H⁺+e_??_MnOOH
This reaction is reversible and its scheme is nearly the same as that of a dry cell.
The conditions of electrolysis that yields the electrochromic brown MnO₂ vary greatly depending on the temperature. The deposits was stable in alkaline solution, and at ±500mV in a NaOH solution, showing reversible coloration and bleaching for up to 10⁴ repetition.