Heterogeneous interface construction of P-doped MoS2 based on the N-doped graphene oxide aerogels for efficient hydrogen evolution

The construction of non-uniform interfaces with inert metal-free electroactive materials is essential to achieve rapid kinetics and high ion/electron transfer rates for HER. Herein, an efficient synthesis strategy is employed, which is the construction of single-atom phosphorus-doped MoS 2 nano-arrays on nitrogen-doped graphene oxide aerogel (P–MoS 2 /NGA), providing a good guarantee for rapid charge transfer and the long-term stability by preventing the massive accumulation of P–MoS 2 . Benefiting from this strategy, the optimized catalyst (P–MoS 2 /NGA) with more surface active sites exhibited unexpected hydrogen precipitation reaction (HER) activity. A current density of 10 mV cm -2 was achieved in 1.0 M KOH with a voltage of only 79 mV and a Tafel slope dec -1 of 97 mV. Density Functional Theory (DFT) confirms the formation of strong P 2p-S 2p-Mo 3d hybridization at the Fermi energy level, resulting in deeper d-band centers and more optimized hydrogen adsorption sites. Therefore, P–MoS 2 nanosheets/nitrogen-doped graphene 3D hybrid aerogel has great potential to become excellent electrochemical hydrogen precipitation material.