Fig. 6
From: A zeolitic vanadotungstate family with structural diversity and ultrahigh porosity for catalysis

Comparison of catalytic activity of VT-1 and other catalysts for NH3-SCR. a Single-metal oxides and b mixed-metal oxides. Reaction conditions: catalyst: 0.15 g with the secondary particle size of 38–106 μm, total flow rate: 250 mL min−1, NO: 250 ppm, NH3: 250 ppm, O2: 4 vol% (Ar as the diluter)