Metal-organic framework loaded manganese oxides as efficient catalysts for low-temperature selective catalytic reduction of NO with NH3

A mild in-situ deposition method was used to fabricate Mn-based catalysts on a UiO-66 carrier for the selective catalytic reduction of NO by NH 3 (NH 3 -SCR). The catalyst with 8.5 wt-% MnO x loading had the highest catalytic activity for NH 3 -SCR with a wide temperature window (100–290 °C) for 90% NO conversion. Characterization of the prepared MnO x /UiO-66 catalysts showed that the catalysts had the crystal structure and porosity of the UiO-66 carrier and that the manganese particles were well-distributed on the surface of the catalyst. X-ray photoelectron spectroscopy analysis showed that there are strong interactions between the MnO x and the Zr oxide secondary building units of the UiO-66 which has a positive effect on the catalytic activity. The 8.5 wt-% MnO x catalyst maintained excellent activity during a 24-h stability test and exhibited good resistance to SO 2 poisoning.