Enhanced self-repair capability of hybrid NiFe layered double hydroxides for alkaline water electrolysis.

NiFe layered double hydroxides (LDHs) modified with a tripodal ligand combine high oxygen evolution reaction (OER) activity with rapid self-repairing capability via colloidal electrochemical deposition. Size reduction of LDHs markedly accelerates deposition, enabling stable performance over 1000 start/stop cycles. These findings advance self-repairing OER catalysts for durable alkaline water electrolysis.