Enhancement of Hydrogen and Oxygen Evolution Reaction Efficiencies by Coupling a MoS2 Nanoflower with a CoMnCr LDH Nanocube on Nickel Foam

The development of highly efficient and durable bifunctional electrocatalysts for the electrolysis of water has become crucial for the advancement of renewable energy systems. In this work, CoMnCr LDH@MoS2/NF, a highly efficient bifunctional electrocatalyst, was developed by combining a CoMnCr LDH nanocube with a MoS2 nanoflower drop-casted on nickel foam to facilitate both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The resulting CoMnCr LDH@MoS2/NF demonstrated exceptionally good electrocatalytic performance in an alkaline environment, with low overpotentials of only 221 and 229 mV required to achieve a current density of 10 mA·cm–2 for HER and OER, respectively. These results were attributed to the MoS2 nanoflower present in between the layers of the CoMnCr LDH nanocube acting as an electron carrier. This enhances the intrinsic activity and provides a considerable specific surface area. The findings of this study propose that the employment of CoMnCr LDH@MoS2/NF offers a valuable approach for investigating high-performance electrocatalysts that exhibit enhanced stability.