Porous bimetallic Mn₂Co₁O_x catalysts prepared by a one-step combustion method for the low temperature selective catalytic reduction of NO_x with NH₃

The porousMn₂Co₁Ox catalysts are prepared by a one-step combustion (CB) method for lowtemperature deNOx process. This catalyst displays an excellentNH₃-SCR activity, achieving 100%NO_x conversion at 150-300 °C. In addition, the catalyst shows high N₂ selectivity, wide operating temperature window, high stability, and high H₂O and SO₂ resistance. The crystalline phase of CoMn₂O₄, porous structure and large specific surface areaare benefi- cial for the deNOx activity. The catalyst exists abundant Mn⁴⁺, Co³⁺ and surface adsorbed oxygen species, which improve the catalyst's redox ability. Plenty of acid sites fromthe strong interaction ofmanganese and cobalt oxide enhance the catalyst performance.