fig6

Figure 6. Electronic structure examination and schematic illustration of the multi-field-enhanced photocatalytic pathway of BiFe(Pt)O₃: (A) TDOS of BiFe(Pt)O₃; (B) PDOS of Fe 3d, Pt 5d, and O 2p orbitals; (C) Charge density distribution of BiFe(Pt)O₃; (D) Fe L_2,3-edge XAS/XMCD spectra of pristine BiFeO₃ and BiFe(Pt)O₃; (E) Pt L_2,3-edge XAS/XMCD spectra of BiFe(Pt)O₃; (F) Schematic illustration of the synergistic enhancement pathway of photocatalytic hydrogen evolution under the coupling of light irradiation, magnetic field, mechanical vibration, and ferroelectric polarization. TDOS: Total density of states; PDOS: partial density of states; XAS: X-ray absorption spectroscopy; XMCD: X-ray magnetic circular dichroism; CB: conduction band; VB: valence band.