Synergistic coupling of NiCoS nanorods with NiCo-LDH nanosheets towards highly efficient hydrogen evolution reaction in alkaline media

As the key step in the overall water splitting system, hydrogen evolution reaction (HER) has become one of the main methods of hydrogen production in industrial applications. Here, through the strong coupling between NiCo-LDH nanosheets and NiCoS nanorods, the three-dimensional heterogeneous structure formed by the com-posite can provide a large catalytic specific surface area. The modification of LDH lamellar will provide abundant edge active sites and enhance its structural stability. The synergistic effect of NiCo-LDH and NiCoS can optimize the electronic structure and promote mass transfer and water cracking. Benefiting from the above points, the NiCoS@NiCo-LDH/NF obtained showed the significant boost in HER process. It only required 99 mV to reach cur-rent density of 10 mA & BULL;cm-2 and maintained excellent durability for 24 h for HER, which proved NiCoS@NiCo-LDH/NF was a cost-free, high-efficient and outstandingly stable HER catalyst in basic solution.

Automated summary

Through strong coupling between NiCo-LDH nanosheets and NiCoS nanorods, a three-dimensional heterogeneous structure is formed, providing a large catalytic specific surface area. The modification of LDH lamellar enhances its structural stability and provides abundant edge active sites. The synergistic effect of NiCo-LDH and NiCoS optimizes the electronic structure and promotes mass transfer and water cracking. The resulting NiCoS@NiCo-LDH/NF exhibits a significantly enhanced HER process, requiring only 99 mV to reach a current density of 10 mA& BULL;cm-2 and maintaining excellent durability for 24 hours, making it a cost-free, high-efficient, and stable HER catalyst in basic solution.