Efficiency definition of the deposition process of electrochromic Ni(OH)2-PVA films formed on a metal substrate from concentrated solutions

Electrochemical devices based on nickel hydroxide electrodes are used in different areas. The main ones chemical current sources, variable transparency “smart” windows, for carrying out electrocatalytic reactions, sensors determining various substances. In this regard, methods of synthesis great interest, especially those that allow forming directly the surface electrodes. One these is electrochemical deposition with cathodic polarization. available information from solutions was considered. It shown data mainly covered dilute 0.01 to 0.25 mol/L Ni(NO3)2. addition, no comparison found literature efficiency formation Ni(OH)2 at concentrations nitrate. To eliminate lack information, dependence concentration nitrate electrodeposition solution determined a constant cathode density 0.625 mA/cm2. resulting decreased nonlinearly increasing concentration. deposit formed case had an X-ray amorphous structure, and it depended little Ni(NO3)2 reached zero 1.5 higher. However, polyvinyl alcohol 2 mol/L, electrochemically electrochromically active films were deposited. calculated indirectly 3.2 2.3 %, respectively. Thus, concluded affected mechanism aqueous