fig2

From: Recent advances in the strategies of developing water-resistant catalysts for the removal of atmospheric pollutants

Figure 2. (A) AC-STEM image of Pt₁/Mn₃O₄; (B) AC-STEM image of Pt₁/R-Mn₂O₃-5D obtained via calcining Pt₁/Mn₃O₄ at 800 °C in air with 3 vol% water vapor for 5 days; (C) AC-STEM image of Pt₁/Mn₂O₃; (D) HRTEM image of Pt_NP/Mn₂O₃-5H obtained via calcining Pt₁/Mn₂O₃^[32]; (A-D) adapted with permission from reference^[32]. Copyright 2020, John Wiley and Sons. Charge density difference of HCHO and H₂O on (E) MnO₂ and (F) Nb-MnO₂. Adsorption configurations of HCHO and H₂O on (G) MnO₂ and (H) Nb-MnO₂^[33]; (E-H) adapted with permission from reference^[33]. Copyright 2026, John Wiley and Sons. AC-STEM: Aberration-corrected scanning transmission electron microscopy; HRTEM: high-resolution transmission electron microscopy.