Partial oxidation of methane to syngas on bulk NiAl2O4 catalyst. Comparison with alumina supported nickel, platinum and rhodium catalysts

Promoting hydrogen production and minimizing catalyst deactivation from the pyrolysis-catalytic steam reforming of biomass on nanosized NiZnAlOx catalysts

“…When the Ni molar ratio was further increased to 25% and 35%, a reduction peak at around 500 °C can be related to the reduction of NiO [56]. Ni content has been reported to dissolve preferably with Al2O3 support at high temperature to form NiAl2O4 spinel phase when Ni loading was low; with the increase of Ni content, bulk NiO particles were formed [58,62].…”

Synthesis of γ-valerolactone by hydrogenation of levulinic acid over supported nickel catalysts

“…Due to the high temperature (> 900 °C) during the flame spray pyrolysis a spinel structure (NiAl 2 O 4 ) or NiO, which is enclosed in alumina and thus more difficult to reduce, might be formed. The TPR profile of the FSP catalyst was similar to those reported for Ni aluminum spinels [40,41]. In addition, transmission electron microscopic analysis was conducted on the reduced Ni/Al 2 O 3 _wi and Ni/Al 2 O 3 _p catalysts to gain insight into the existence of small and large Ni particles as assumed from XRD and TPR analysis.…”

Preparation and characterization of Pd–Ni bimetallic catalysts for CO and C3H6 oxidation under stoichiometric conditions

“…Based on the reference NiO sample and earlier reports, bands at 370-380 and 715-720 nm can be assigned to the octahedrally coordinated Ni 2+ species in NiO lattice. The octahedral Ni 2+ species in Al 2 O 3 lattice have been found at 420-430 nm, while the tetrahedral Ni 2+ species in Al 2 O 3 lattice (NiAl 2 O 4 spinel) have been found at 550-555 and 600-645 nm range [49,53,54]. Characteristic bands of the tetrahedral Ni 2+ species in Al 2 O 3 lattice were present in both fresh and aged Ni-W samples, however the bands intensity was lower in the case of the fresh samples.…”