Cu, Fe and Mn oxides intercalated SiO2 pillared magadiite and ilerite catalysts for NO decomposition

NO Catalytic Reduction on Urea-Loaded Ferromanganese Catalysts: Performance, Characterization, and Mechanism

“…As shown in Figure b, the spectrum of O 1s XPS is fitted to two peaks, which belong to lattice oxygen (O α ) of metal oxides with a low binding energy (529.8 eV) and surface chemisorbed oxygen (O β ) at a high binding energy (532.9 eV), respectively. O β could be assigned to the O 2– species of SBA-15 and O – species belonging to oxygen vacancies. , Low-valence manganese ions indeed led to the increase of oxygen vacancies; the content of chemisorbed oxygen and oxygen vacancies in the catalysts increased from 94.0 to 95.7% in urea(15)–o-MnFe/SBA-15 after the reaction (Table ). A large amount of chemically adsorbed oxygen in the catalyst can easily be exchanged with gaseous oxygen on the catalyst surface.…”

“…O β could be assigned to the O 2− species of SBA-15 and O − species belonging to oxygen vacancies. 43,44 Low-valence manganese ions indeed led to the increase of oxygen vacancies; the content of chemisorbed oxygen and oxygen vacancies in the catalysts increased from 94.0 to 95.7% in urea(15)−o-MnFe/SBA-15 after the reaction (Table 1). A large amount of chemically adsorbed oxygen in the catalyst can easily be exchanged with gaseous oxygen on the catalyst surface.…”

Low-temperature direct decomposition of NO over Rh/NC-MnFe catalyst: activity, stability and mechanism

“…Fig. 8b shows the spectra of Mn, which could be deconvoluted two split peaks with binding energies at around 640.7 and 642.0 eV according to the fitting of the Mn 2p 3/2 peak, which corresponds to Mn 2+ and Mn 3+ species, 34,37,38 respectively. Similarly, two split peaks with binding energies at around 710.1 eV and 712.0 eV-712.6 eV were fitted from Fe 2p 3/2 peak, as shown in Fig.…”