The alkaline hydrogen evolution reaction (HER) is intricately linked to the water dissociation kinetics. The quest for new strategies to accelerate this step is a pivotal aspect of enhancing the HER performance. Herein, we designed and synthesized a heterogeneous nickel phosphide/cobalt phosphide nanowire array grown on nickel foam (Ni 2 P/CoP/NF) to form a p-n junction structure. The built-in electric field (BEF) in the p-n junction optimizes the binding ability of hydrogen and hydroxyl intermediates, efficiently promoting water dissociation for the alkaline HER. Consequently, Ni 2 P/CoP/NF exhibits a lower overpotential of 58 and 118 mV at 30 and 100 mA cm -2 , respectively, and high stability over 40 h at 300 mA cm -2 for the HER in 1 M KOH. Computational calculations combined with experiment results testify that the BEF presence in the p-n junction of Ni 2 P/CoP/NF effectively promotes water dissociation, regulates intermediate adsorption/desorption, and boosts electron transport. This study presents a rational design approach for high-performance heterogeneous electrocatalysts.
Keyphrases
- electron transfer
- signaling pathway
- metal organic framework
- lps induced
- oxidative stress
- pi k akt
- nuclear factor
- reduced graphene oxide
- high resolution
- carbon nanotubes
- oxide nanoparticles
- molecular dynamics
- molecular dynamics simulations
- immune response
- binding protein
- transcription factor
- dna binding
- ionic liquid
- transition metal