A g-CthreeNfour allotrope, a curved leaf-like graphitic C2Nthree (g-C2Nthree) with an intrinsic spontaneous polarization electrical area (ISPEF), has been constructed for environment friendly photo voltaic power conversion into H2 power by way of photocatalytic H2O splitting. The curved leaf-like π-delocalization g-C2Nthree was composed of fragrant azide pentagons and regular triazine hexagons obtained by cycloaddition between −C≡N teams from dicyandiamide polymerization and azide from the heat-treated polypyrrole fibers. Underneath mild irradiation (λ > 420 nm), photo-generated expenses are pushed to separate effectively and switch from bulk to energetic websites of the floor beneath ISPEF that’s reverse to the Coulomb area. Consequently, with none cocatalyst, g-CthreeNfour allotrope demonstrates a really excessive H2-production exercise of 14.9 mmol g–1 h–1 accompanied by lots of H2 bubbles, which is 2.6 instances of g-CthreeNfour loading with Pt. Compared with the reported metal-free photocatalysts or these supported with noble metals, g-CthreeNfour allotrope (i.e., leaf-like g-C2Nthree) is confirmed to be the most effective metal-free photocatalyst for H2O splitting into H2 gasoline to date. The contructed leaf-like g-C2Nthree with SPEF provides an appropriate platform for photo voltaic power conversion into H2 gasoline, which actively contributes to scrub power manufacturing.