The enhanced performance of the N-Pt-N framework can be attributed to the unique chemical environment created by the nitrogen atoms and the phenalene framework. Nitrogen atoms provide an electron-rich coordination site, which stabilizes the adsorbed hydrogen radical (H * ) by reducing the energy required for its formation. Simultaneously, the presence of the ether group further modulates the electronic structure, fine-tuning the charge distribution and ensuring efficient electron transfer during the reaction. Together, these features synergistically minimize the thermodynamic and kinetic barriers of the reaction, leading to a remarkably low overpotential and demonstrating the critical role of the N-Pt-N chemical environment in advancing photocatalytic hydrogen production.