Promotional Effect on Selective Catalytic Reduction of NO_x with NH₃ over Overloaded W and Ce on V₂O₅/TiO₂ Catalysts

Figure 5

XRD patterns of catalysts with a ratio of promoter : vanadium—(a) 9 : 3, (b) 9 : 1, and (c) 15 : 1 (•: CeO₂, ▴: WO₃).

(a)

(b)

(c)