“…11–15 Thus, developing an earth-abundant water oxidation catalyst with the properties of low-cost, effectiveness, high energy efficiency, and long-term durability is of great importance for improvement of the sluggish kinetics of OER. 16,17 Hence, researchers have concentrated on the design of alternative OER catalysts based on 3d transition metals, for instance, forming mixed metal oxides, 18,19 sulfides, 20–22 selenides, 23–25 nitrides, 26–28 phosphides, 29,30 their hybrids 31–33 and so on. Among the above alternatives, transition metal sulfides (TMSs) with semiconductor properties and better conductivity can facilitate the charge transfer process, 34 and are regarded as the most promising candidate to replace precious metals.…”