Ceria modified MnOx/TiO2 as a superior catalyst for NO reduction with NH3 at low-temperature

Effect of manganese substitution on the structure and activity of iron titanate catalyst for the selective catalytic reduction of NO with NH3

“…8D, the O 1s peak was fitted into two peaks by searching for the optimum combination of Gaussian bands with the correlation coefficients (r 2 ) above 0.99. The peak at 530.2 eV corresponds to the lattice oxygen O 2À (denoted as O b ), and the one at 531.6 eV corresponds to the surface adsorbed oxygen (denoted as O a ) such as O 2 2À or O À belonging to defectoxide or hydroxyl-like group [49,53]. The surface chemisorbed oxygen O a was reported to be highly active in oxidation reaction due to its higher mobility than lattice oxygen O b [53,54], and the high relative concentration ratio of O a /(O a + O b ) on catalyst surface could be correlated with high SCR activity [49].…”

Manganese–niobium mixed oxide catalyst for the selective catalytic reduction of NOx with NH3 at low temperatures

“…The peaks at 529.7-530.1 eV could be attributed to the lattice oxygen O 2À (denoted as O b ). The peaks at 531.3-531.7 eV were assigned to the surface adsorbed oxygen (denoted as O a ) [22,23]. Usually, the surface oxygen O a is more reactive in oxidation reactions due to its higher mobility than lattice oxygen O b [23,24].…”

Environmentally-benign catalysts for the selective catalytic reduction of NOxfrom diesel engines: structure–activity relationship and reaction mechanism aspects

“…Long and Yang 67 found that Ce doping could enhance the stability of Fe-ZSM-5 catalysts, and Carja et al 68 concluded that the synergistic effect between Fe and Ce in Fe-Ce-ZSM-5 catalysts could greatly improve the deNO x efficiency. Wu et al 69,70 concluded that a Ce-promoted Mn/TiO 2 catalyst showed better SO 2 resistance in the low temperature NH 3 -SCR process. Li et al 71 prepared a supported WO 3 catalyst using CeO 2 -ZrO 2 mixed oxide as a support, exhibiting excellent NH 3 -SCR activity and thermal stability, as a potential candidate for the deNO x process of diesel engines.…”