Reversibility of Mn Valence State in MnOx/TiO2 Catalysts for Low-temperature Selective Catalytic Reduction for NO with NH3

Rational design on photo(electro)catalysts for artificial nitrogen looping

“…In particular, Ti-based materials have been extensively studied due to their high photocatalytic activity and stability. 116,[128][129][130][131][132] Titanium alkoxides prepared by the high-temperature hydrolysis method have shown high denitrification activity, with a high absorption rate of 98% for NO photocatalytic oxidation. 133 In 2008, TiO 2 nanoparticles coating on woven glass fabric was used as a photocatalyst, which showed a good effect for removing nitrogen oxides and an efficiency of 63.9% upon the steady-state.…”

“…Photocatalytic denitrification treatment shows great potential in the reduction of nitrogen oxides in the exhaust gas. In particular, Ti‐based materials have been extensively studied due to their high photocatalytic activity and stability 116,128‐132 . Titanium alkoxides prepared by the high‐temperature hydrolysis method have shown high denitrification activity, with a high absorption rate of 98% for NO photocatalytic oxidation 133 .…”

Mn/beta and Mn/ZSM-5 for the low-temperature selective catalytic reduction of NO with ammonia: Effect of manganese precursors

“…6(a)) displays two broad peaks located at ~642 eV and 653 eV ascribed to Mn 2p3/2 and Mn 2p1/2, respectively [39]. For catalysts prepared using the manganese nitrate precursor, the Mn 2p3/2 spectra was deconvoluted and fitted with three components: Mn2O3 (641.2 eV), MnO2 (642 eV) [13,15] and an obvious peak at 644.2 ± 0.4 eV corresponding to Mn-nitrate [40,41]. This result proved that manganese nitrate decomposed incompletely when subjected to a low sintering temperature of 400 °C.…”

Synergistic photo-thermal catalytic NO purification of MnO /g-C3N4: Enhanced performance and reaction mechanism

“…However, for the used MnOx, the Mn-nitrate species appears with the binding energy at 644.6 eV, and can be attributed to the adsorption of NO oxidation. However, Mn 2p3/2 can be deconvoluted into Mn 2+ , Mn 3+ , and Mn 4+ for fresh (or used) 1:5 MnOx/g-C3N4, with the characteristic binding energy at 640.5 (640.7), 641.7 (641.8) and 643.2 eV (643.1), respectively [4,[26][27][28], which indicates that the introduction of g-C3N4 could affect the formation of various valence states of Mn in MnOx via precipitation.…”