NiS 2 /NiS/Mn 2 O 3 Nanofibers with Enhanced Oxygen Evolution Reaction Activity.

The development of efficient and cost-effective electrocatalysts is crucial for achieving a green hydrogen economy through electrocatalytic water splitting. Herein, we report an excellent catalyst, one-dimensional NiS 2 /NiS/Mn 2 O 3 nanofibers prepared by electrospinning, which exhibits outstanding electrochemical performance in an alkaline solution. We explored effective strategies to construct one-dimensional nanostructures and composite oxides to promote the electrocatalytic performance of transition metal dichalcogenides. At a current density of 20 mA cm -2 , it requires an overpotential of 333 mV for OER. Furthermore, NiS 2 /NiS/Mn 2 O 3 nanofibers maintain good durability even after 1000 cycles. The long-term electrochemical stability test of the catalyst NiS 2 /NiS/Mn 2 O 3 was implemented at 20 mA cm -2 for 12 h. The potential remained at 99.52%. Therefore, this study demonstrates that NiS 2 /NiS/Mn 2 O 3 can serve as a viable green hydrogen production electrocatalyst.