We designed and fabricated non-precious and highly efficient electrocatalysts of nickelmolybdenum/copper-nanosheets/nickel-foam composites (NiMo/Cu-NS/NF) by step electrodepositions, combining with chemical oxidation method. The catalysts were charaterized by means of SEM, XRD and XPS spectra. Their electrocatalytic activities were assessed by hydrogen evolution reactions (HER) over a wide pH range, where acidic, neutral and alkaline electrolytes were used, respectively. Benefiting from the unique midlayer Cu nanosheets (NS) architecture and optimum Mo–Ni composition at the surface layer which led to high electronic conductivity and large electrochemically active surface area (ECSA), the NiMo/Cu-NS/NF-2 catalyst displayed superior electrocatalytic activities with low overpotentials of η₁₀ = 43, 86 and 89 mV in 0.5 M H₂SO₄, 1.0 M PBS and 1.0 M KOH electrolyte, respectively. Especially in the acidic condition, it exhibited the best electrocatalytic activity with smaller Tafel slope of 54 mV dec⁻¹ and higher exchange current density of 1.93 mA cm⁻².

通过分步电沉积，结合化学氧化方法，设计并制备了非贵金属且高效的镍钼/铜纳米片/镍泡沫复合材料（NiMo / Cu-NS / NF）电催化剂。借助SEM，XRD和XPS光谱对催化剂进行了表征。它们的电催化活性通过在较宽的pH范围内发生放氢反应（HER）进行评估，分别使用酸性，中性和碱性电解质。NiMo / Cu-NS / NF-2催化剂得益于独特的中层Cu纳米片（NS）结构和表面层的最佳Mo-Ni组成，从而带来了高电子电导率和大电化学活性表面积（ECSA），用的低的超电势的电活动η ₁₀ = 43，86和89毫伏在0.5Mħ ₂ SO ₄，1.0M PBS和1.0M KOH电解质，分别。尤其在酸性条件下，它表现出最佳的电催化活性，塔菲尔斜率较小，为54 mV dec ^-1，交换电流密度较高，为1.93 mA cm ^-2。