Synergy of CuNiFe-LDH based catalysts for enhancing low-temperature SCR-C3H6 performance: Surface properties and reaction mechanism

Rationally tailored redox ability of Sn/γ-Al2O3 with Ag for enhancing the selective catalytic reduction of NOx with propene

“…The negative band assigned to adsorbed water at 1654 cm −1 was gradually weakened with the introduction of C 3 H 6 , which was related to the formation of the R–NO 2 intermediates (1651 cm −1 ). 14 Fig. 9d demonstrate the consumption rates of monodentate nitrates and bidentate nitrates as C 3 H 6 was introduced, and both were consumed ca.…”

“…Due to the abundant reserves and low price, transitional metal-based catalysts such as Cu, Sn, Fe, Co, and Mn have been widely studied for C 3 H 6 -SCR. [11][12][13][14][15][16][17][18][19] In addition, due to the strong oxidizing ability of precious metals and excellent NO x removal performance, Ag, Pt, Pd and other precious metals are also widely used in various industrial ue gases purication. 20,21 Among them, SnO 2 has been found to be rich in surface oxygen vacancies and acidic sites and showed great potential.…”

Facile H2O-Contributed O2Activation Strategy over Mn-Based SCR Catalysts to Counteract SO2Poisoning

“…As presented in Figure b, two characteristic peaks centered at α (380–405 °C) and β (413–457 °C) appeared, corresponding to dissociated oxygen species at vacancy sites (O 2 – , O – ) and surface lattice oxygen (O latt 2– ), respectively. The former adsorbed oxygen species were always considered as reactive oxygen species (ROS). , After being poisoned by SO 2 , part of the ROS was converted into O 2– in MnSO 4 , implying that the mobility of ROS was hindered. As a sharp comparison, ROS content in Mn-NSOH exhibited an increase from 39.6 to 46.1%.…”

“…The former adsorbed oxygen species were always considered as reactive oxygen species (ROS). 6,38 After being poisoned by SO 2 , part of the ROS was converted into O 2− in MnSO 4 , implying that the mobility of ROS was hindered. As a sharp comparison, ROS content in Mn-NSOH exhibited an increase from 39.6 to 46.1%.…”