As a member of the transition metal sulfide family, cobalt sulfides (CoS_x) are considered as highly-activity, cost-effectively, as well as stable electrocatalysts with huge potential for the application of water splitting. Combining experiments and theoretical calculations, we demonstrated that F dopants could activate the Co and S sites of CoS₂ in CoS₂@NF composites prepared via one-step hydrothermal method and contribute to enhance the intrinsic electrical conductivity, achieving a significantly improved activity of water splitting. The improved surface wettability in F-doped CoS₂@NF composites ensures rapid electrolyte penetration and accelerates migration of hydroxyl as well as oxygen release. Furthermore, the F-doped CoS₂@NF composites exhibit remarkable electrocatalytic activity and excellent long-term operational stability for overall water splitting in alkaline and neutral media. Predominantly, our work could be explored to enhance and understand the catalytic properties of other transition metal sulfides, and be also expected for further progress achieved with other nonmetal element dopants.

作为过渡金属硫化物家族的一员，硫化钴（CoS _x）被认为是高活性，具有成本效益的，并且是稳定的电催化剂，具有用于水分解的巨大潜力。结合试验和理论计算，我们证明了那个F掺杂物可激活的CoS的合作和S点₂在COS _2层@NF复合材料通过一步法水热法制备，并有助于增强本征导电性，实现水的显著改善活动分裂。掺F的CoS ₂ @NF复合材料的改善的表面润湿性确保了电解质的快速渗透，并加速了羟基的迁移以及氧气的释放。此外，掺F的CoS₂ @NF复合材料对碱性和中性介质中的总水分解显示出卓越的电催化活性和出色的长期运行稳定性。主要地，可以探索我们的工作以增强和理解其他过渡金属硫化物的催化性能，并且还有望与其他非金属元素掺杂剂一起取得进一步的进展。