Flexible Ti Mesh-Supported MnO_x–CuO_x/TiO₂ Nanosheet Monolithic Catalysts for Low-Temperature Selective Catalytic Reduction of NO_x with NH₃

Abstract

In this work, we report the design and fabrication of flexible Ti mesh-supported MnO x −CuO x /TiO 2 nanosheet monolithic catalysts for NH 3 −SCR in low temperature, which demonstrates considerable wide-temperature window and high N 2 selectivity. The flexible Ti mesh-supported MnO x −CuO x /TiO 2 nanosheet monolithic catalysts can achieve approximately 100% conversion of NO x with high N 2 selectivity in the wide range of 145−300 °C and remarkable water resistance as well as long-term stability. This remarkable catalytic performance observed can be ascribed to the elevated specific surface area, robust synergistic interactions with Mn and Cu species, and substantial generation of Mn 4+ and Cu 2+ . This work may provide more opportunities for practical applications of flexible Cu−Mn-based catalysts in diverse fields far beyond NH 3 −SCR. KEYWORDS: MnO x −CuO x /TiO 2 , nanosheet, de-NO x , NH 3 −SCR, in situ growth, monolithic catalysts

Unveiling the Promoting Effect of Niobium on Cu-KIT-6 Nanoporous Catalysts for the Selective Catalytic Reduction of NOx with High Resistance to Ammonium Bisulfate Poisoning

“…Nitrogen oxides (NO x ), as one of the common major atmospheric pollutants, have caused a series of environmental problems including acid rain, photochemical smog, and haze. − At present, selective catalytic reduction (SCR) of NO x with ammonia (NH 3 -SCR) is state-of-the-art technology for NO x emission abatement from stationary sources. − However, due to the narrow temperature window (300–400 °C) and toxicity of vanadium, the current commercial V 2 O 5 -WO 3 /MoO 3 -TiO 2 catalysts were severely limited to application in current medium/low-temperature flue gas from non-electricity industries. − Thus, the development of a particular nonvanadium catalyst with superior SCR performance has been of much concern.…”