fig6

Figure 6. (A) Schematic synthesis of the Bi₂O₃/BiO₂ heterojunction; (B) XRD patterns of the Bi₂O₃/BiO₂ heterojunction. Comparison of TOF, electrochemical testing plots; (C) In situ Raman spectra of the Bi₂O₃/BiO₂ heterojunction during electrocatalysis; (D) DOS of the Bi p orbital with different intermediations adsorbed. Reprinted with permission from Ref.^[65]. Copyright 2022, American Chemical Society; (E) HRTEM images of SnO₂/Bi₂O₃; (F, G) XPS spectra of SnO₂, Bi₂O₃, SnO₂/Bi₂O₃. Reprinted with permission from Ref.^[66]. Copyright 2021, Wiley-VCH. XRD: X-ray diffraction spectroscopy.