Contributions of Mn-doping in CuO/Al2O3 sorbent for enhancement of H2S removal at low and wide temperature range

In Situ-Formed PtMn Intermetallic Subnanoclusters on Mn-Doped Mesoporous Al2O3 as Efficient Catalysts for Propane Dehydrogenation

“…Two main peaks assigned to Mn 2p 1/2 (653.3 eV) and Mn 2p 3/2 (641.3 eV) can be observed in Figure a. By performing a peak-fitting deconvolution, the Mn 2p 3/2 spectra were fitted with three peaks at 640.4–640.7, 641.5–642.6, and 644.5–645 eV for the Mn-doped catalysts, which were assigned to Mn 2+ , Mn 3+ , and Mn 4+ ions, respectively. , Furthermore, there was a satellite peak at 647 eV in the Mn 2p 3/2 region, which further confirmed the presence of the Mn 2+ species in the Mn-modified catalysts. The contents of Mn 2+ and Mn 3+ ions (Table ) on the surface of the Pt/2Mn-Al 2 O 3 catalyst were the largest, which might benefit the dehydrogenation reaction .…”

Forming a Cu-Based Catalyst for Efficient Hydrogenation Conversion of Starch into Glucose

“…According to a previous study [34], the lowest binding energy corresponds to lattice oxygen (O α ) in mixed metal oxide, the medium binding energy is assigned to surface-adsorbed oxygen (O β ) species, and the highest binding energy is attributed to surface hydroxyl species (O γ ). Here, three peaks centering on 529.5 eV (O α ), 531.0 eV (O β ), and 532 eV (O γ ) are assignable to lattice oxygen (Al-O, Cu-O), chemically adsorbed oxygen, and adsorbed water [35]. As depicted in Figure 3c, in the high-resolution XPS spectra of the Cu 2p core level of the reacted CuO/Al 2 O 3 particles, the signal can be divided into five peaks at around 933.8 eV, 941.3 eV, 943.5 eV, 953.8 eV, and 962.2 eV [36].…”

“…Here, three peaks centering on 529.5 eV (Oα), 531.0 eV (Oβ), and 532 eV (Oγ) are assignable to lattice oxygen (Al-O, Cu-O), chemically adsorbed oxygen, and adsorbed water [35]. As depicted in Figure 3c, in the high-resolution XPS spectra of the Cu 2p core level of the reacted CuO/Al2O3 particles, the signal can be divided into five peaks at around 933.8 eV, 941.3 eV, 943.5 eV, 953.8 eV, and 962.2 eV [36].…”