Similarly to HER, the MoS 2 @NiFeCo-LDH catalyst demonstrates notable durability in alkaline media at a current density of 10 mA cm -2 . Indeed, the results in Figure show that MoS 2 @NiFeCo-LDH retains its stability for over 48 h under OER conditions. The LSV curves before and after 500 cycles in Figure provide further evidence of the MoS 2 @NiFeCo-LDH's excellent durability under OER conditions. The stability is not affected by additional, 500 cycles under light illumination, as shown in Figure . Furthermore, the MoS 2 @NiFeCo-LDH electrode demonstrates excellent stability at industrially relevant OER current densities of 100, 500 and 1000 mA cm -2 (Figure ), with negligible performance degradation or changes in the potential or structure during the 75-hour electrolysis.