Esca investigations of some NiO/SiO2 and NiO—Al2 O3 /SiO2 catalysts

Characterization of the uptake of aqueous Ni2+ ions on nanoparticles of zero-valent iron (nZVI)

“…This value lies far from the one of the Ni 2p 3/2 line of metallic nickel well reported to occur at 852.8 ± 0.2 eV [23,24]. The measured value seems to be close to the binding energy of the Ni 2p 3/2 line reported for Ni 2+ in NiO at 854.4 ± 0.2 eV [24,25], and for Ni 2+ in Ni (OH) 2 , reported at 855.6 eV [26,27] to 856.0 eV [28]. This is probably indicating that, at the investigated high loading, Ni 2+ ions tend to be fixed on nZVI mainly by surface precipitation rather than a redox mechanism.…”

First Row Transition Metal Oxide Based Catalysts for the In-situ Reactions of Methanation and Desulfurization in the Removal of Sour Gases from Simulated Natural Gas

“…The E b of each species observed in Ni (2p) region for the fresh Pr/ Co/ Ni-Al 2 O 3 catalyst are characteristic of the Ni 2+ ion from the NiO at the E b of 854.2 eV (2p 3/2 ) and 871.8 eV (2p 1/2 ), similar assignment to the data obtained made by Nefedov et al (1975) who investigated on some coordination compounds; and Lorenz et al (1979) who studied ESCA on NiO/ SiO 2 and NiO-Al 2 O 3 / SiO 2 catalysts. The existence of Ni (2p) peak at 856.8 eV (2p 3/2 ) and 874.3 eV (2p 1/2 ) was attributed to the presence of Ni 3+ in Ni 2 O 3 .…”

Investigation of epitaxial LaNiO3−x thin films by high-energy XPS

“…As was mentioning above, the rare earth oxides are easily hygroscopic when they were exposed to atmospheric conditions [14]. Thus, an additional spectral component C at approximate 531 eV may be attributed to La and Ni hydroxides [23,26,27] for which O 1s BE is typically higher by a 2.0-2.5 eV in respect to the associated lattice oxygen [14].]. The supplementary peak at Fig.…”