fig9

Figure 9. Strategies for improving the synergistic catalytic conversion of NO_x and VOCs under sulfur-poisoning conditions. (A) SO₂ effect on V₂O₅-WO₃/TiO₂ catalyst for synergistic removal of NO_x and CB^[87]; (B) SO₂ poisoning mechanism of the PdV/TiO₂ catalyst for NO_x and CB synergistic degradation^[98]; (C) CaO-induced mitigated sulfur-poisoning on the synergistic catalyst for NO_x and CH₃SH elimination^[99]. Figure 9A is reprinted with permission from Ref.^[87], Copyright © 2019 American Chemical Society. Figure 9B is reprinted with permission from Ref.^[98], Copyright © 2021 American Chemical Society. Figure 9C is reprinted with permission from Ref.^[99], Copyright © 2025 American Chemical Society. NO_x: Nitrogen oxides; VOCs: volatile organic compounds; CBCO: chlorobenzene catalytic oxidation; SCR: selective catalytic reduction.