Interfacial Co–Ni Dual‐Site Synergy in Confined Co <sub>9</sub> S <sub>8</sub> –Ni <sub>3</sub> S <sub>2</sub> Heterostructures for Electroc
Although heazlewoodite‐type nickel sulfide (Ni 3 S 2 ) exhibits promising hydrogen evolution reaction (HER) activity, its application in overall water splitting remains limited by sluggish oxygen evolution reaction (OER) kinetics associated with insufficient water activation. Herein, Co 9 S 8 –Ni 3 S 2 he...