fig7

Figure 7. (A) Charge density difference for O₂ adsorbed on Fe₃O₄(220)-CNV. (B) HRTEM image of Fe₃O₄@TNC. (C) Free energy diagram at U = 0.7 V for the reduction of O₂ to H₂O₂. (D) Capacitance current densities measured at 1.0 V using 40 mF cm^-2 as the specific capacitance standard. (A-D) is reprinted with permission from Ref.^[164]. Copyright © 2025 The Royal Society of Chemistry. (E) Optimized adsorption configuration of the *OCHO intermediate on the Zn-Sn (101) alloy surface. (F) TEM images of Zn/SnO₂ at different magnifications; the inset is the corresponding SAED pattern. (G) Calculated reaction energy profiles for water oxidation on the Zn site of Zn/SnO₂. (H) Faradaic efficiency of formate (FE_HCOO-) over bare SnO₂ and Zn/SnO₂. (E-H) is reprinted with permission from Ref.^[165]. Copyright © 2023 Wiley-VCH GmbH. (I) Adsorption model of O₂ molecules on ZnO@ZnO₂; red and gray spheres represent O and Zn atoms, respectively. (J) HRTEM image of ZnO treated with 0.4 mol L^-1 H₂O₂. (K) LSV curves of ZnO, ZnO@ZnO₂, and ZnO₂ measured in 0.1 M K₂SO₄, with ring currents in the upper part and disk current densities in the lower part. (L) Calculated electron transfer number and H₂O₂ selectivity in 0.1 M K₂SO₄; the bottom panel shows electron transfer number and the upper panel shows H₂O₂ selectivity. (I-L) is reprinted with permission from Ref.^[166]. Copyright © 2023 The Royal Society of Chemistry. (M) Image of the final obtained In₂O_3-x catalyst. (N) AC-TEM images of In₂O_3-x. (O) LSV curves of RRDE measurement at 5 mV s^-1 and 1,600 rpm in O₂-saturated 0.1 M KOH. (P) Calculated H₂O₂ selectivity of In₂O_3-x. (M-P) is reprinted with permission from Ref.^[167]. Copyright © 2024 The Royal Society of Chemistry.