Ultrafast liquid Joule heating to <i>in situ</i> fabricate and stabilize NiFe-LDH for enhanced oxygen evolution electrocatalysis

Herein, we firstly report an ultrafast liquid Joule heating (ULJH) strategy for <i>in situ</i> fabrication and stabilization of NiFe-LDH nanosheets, enhancing the oxygen evolution reaction (OER). ULJH efficiently suppresses agglomeration, yielding ultrathin nanosheets with exposed active edges. At the same time, strong interfacial bonding ensures operational stability. The NiFe-LDH-JH demonstrates exceptional OER performance, achieving a current density of 100 mA cm^-2 at a low overpotential of 262 mV with minimal attenuation after 300 h of operation.