The electrodeposition of Ni-MoO2 composite coatings is a specific process taking place under defined hydrodynamic conditions. In this work the influence of hydrodynamics, current density, and MoO2 concentration on the electrodeposition of Ni-MoO2 coatings from a suspension of MoO2 particles in a Watt’s type bath were investigated by com-parison of their polarization characteristics for the hydrogen evolution reaction (HER) in 1 M NaOH at room temperature. It was shown that electrolyte and air flow rates influence the process of coating electrodeposition at low concentrations of MoO2. With increases in MoO2 concentration the current density became the main parameter influencing the coatings’ properties. The best coating, with the lowest over-voltage for the HER, was obtained from the suspension containing 3 g dm-3 of MoO2 particles. The over-voltage of this coating was 57 mV lower for the HER at j = –0.3 A cm-2 (the current density used in industrial applications) than that for the commercial De Nora’s Ni + RuO2 electrode.
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机译：Ni-MoO2复合涂层的电沉积是在确定的流体动力学条件下发生的特定过程。在这项工作中，通过比较它们在氢型反应中的极化特性（HER），研究了流体动力学，电流密度和MoO2浓度对MoO2颗粒在Watt型浴中的悬浮液中Ni-MoO2涂层电沉积的影响。 ）在室温下加入1 M NaOH。结果表明，在低浓度的MoO2下，电解液和空气流速会影响涂层电沉积的过程。随着MoO2浓度的增加，电流密度成为影响涂层性能的主要参数。从含有3 g dm-3的MoO2颗粒的悬浮液中获得具有HER最低过电压的最佳涂层。在j = –0.3 A cm-2（工业应用中使用的电流密度）下，HER的涂层的过电压比商用De Nora的Ni + RuO2电极低57 mV。
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