fig7

Figure 7. (A) Schematic illustration of the preparation process of Bi-NFs in situ synthesis on Cu foil; (B) In situ Raman spectra characterization derived from Bi-NFs. Reprinted with permission from Ref.^[68]. Copyright 2023, Wiley-VCH; (C) SEM characterization of the Bi₂O₃; (D) FE formate plots as a function of different deposition times. Reprinted with permission from Ref.^[69]. Copyright 2019, Wiley-VCH; (E) Illustration of the formation process of the Bi₂O₃NSs@MCCM; (F) j_(HCOOH) of the Bi₂O₃NSs@MCCM and other comparison samples. Reprinted with permission from Ref.^[70]. Copyright 2019, Wiley-VCH. FE: Faraday efficiency; Bi-NFs: Bi nanoflowers.