fig3

Figure 3. (A) NO conversion over different Ir catalysts (1000 ppm NO, 2,000 ppm CO, 2vol.% O₂, N₂ balance, GHSV = 50,000 h^-1)^[74]. Copyright 2021, Wiley-VCH; (B) NO conversion and (C) N₂ selectivity over different Ag catalysts; (D) Bader charge values of Ag atoms calculated for different Ag catalysts^[79]. Copyright 2023, American Chemical Society; (E) SRPES data for Pd₁/CeO₂ (red line) and Pd NPs/CeO₂ (blue line) samples; (F) The proposed structural models of Pd NPs/CeO₂ (top) and Pd₁/CeO₂ (bottom) catalysts; (G) CO IRAS spectra for Pd₁/CeO₂ (red line) and Pd NPs/CeO₂ (blue line) samples. (color code: yellow, Ce; red, O; blue, Pd; and black, C)^[83]. Copyright 2023, Springer; (H) NO conversion and (I) N₂ selectivity over Cr_0.19Rh_0.06CeO_z, Rh_0.04CeO_z, Cr_0.17CeO_z, and CeO₂ (0.5% NO, 1.0% CO, 5% Ar, He balance, GHSV = 65,00 h^-1)^[84]. Copyright 2021, American Chemical Society; (J) NO conversion and (K) N₂ selectivity over Fe₁/CeO₂-Al₂O₃, Fe₁/Al₂O₃ and CeO₂-Al₂O₃ (500 ppm NO, 0.6% CO, N₂ balance, GHSV 30 000 h^-1); (L) Model structure of the catalyst surface with or without O_v^[87]. Copyright 2024, American Chemical Society; (M) Model structure of Mg₁₁CuAl₂₄O₄₇ with O_v^[90]. Copyright 2019, The Royal Society of Chemistry. Ir: Iridium; GHSV: gas hourly space velocity; SRPES: synchrotron radiation photoemission spectroscopy; O_v: oxygen vacancies.