Self−supported Ni3S2 nanoarrays as multi−functional catalysts for efficient alkaline water and seawater electrolysis

This study synthesised a nickel sulphide nanoarray structure electrocatalyst with nickel foam as the metallic substrate. Research data indicates that the enhanced catalytic activity primarily stems from its unique nano-array morphology, which exposes a larger electrochemically active specific surface area and provides abundant active sites. Crucially, a strong coupling exists between the nickel foam substrate and the Ni₃S₂ nano-array catalyst. The robust Ni−S chemical bonds formed during hydrothermal preparation significantly enhance catalytic activity, electronic conductivity, and structural stability.

本研究以金属泡沫镍（nickel foam）为基底，合成了硫化镍纳米阵列结构电催化剂（electrocatalyst）。研究数据表明，该催化剂的催化活性提升主要源于其独特的纳米阵列形貌：该形貌可暴露更大的电化学活性比表面积，并提供丰富的活性位点。尤为关键的是，泡沫镍基底与Ni₃S₂纳米阵列催化剂之间存在强相互耦合作用。在水热制备过程中形成的牢固Ni−S化学键，可显著提升催化剂的催化活性、电子导电性与结构稳定性。