Fig. 4: Catalytic performance of Mn1/CeO2 for NOx removal.
From: Designer topological-single-atom catalysts with site-specific selectivity
a NH3-temperature programmed desorption (TPD) curve. Colour code: Nitrogen, blue; Oxygen, red; Hydrogen, white; Cerium, yellow; Manganese, purple. a. u. arbitrary units. b NH3 oxidation (reaction conditions: [NH3] = 500 ppm, [O2] = 5 vol%). c NO oxidation (reaction conditions: [NO] = 500 ppm, [O2] = 5 vol%). d–f NO conversion, N2 selectivity and N2O production for all the catalysts (reaction conditions: [NH3] = [NO] = 500 ppm, [O2] = 5 vol%). g NO conversion for all the catalysts (reaction conditions: [NH3] = [NO] = 500 ppm, [O2] = 5 vol%, [H2O] = 0 vol%, [SO2] = 100 ppm). Corresponding N2 selectivity data is presented in Fig. S41. h Effect of H2O and SO2 at 180 °C on the NH3-SCR performance of Mn1/CeO2. (Reaction conditions: [NH3] = [NO] = 50 ppm, [O2] = 5 vol%, [H2O] = 0 or 10 vol%, [SO2] = 0 or 100 ppm). i Kinetic analysis of the catalysts during the NH3-SCR reaction (further details can be found in the Methods section).
