Cobalt oxide supported on alumina catalysts prepared by various methods for use in catalytic afterburner of PEM fuel cell

Cobalt modified red mud catalytic ozonation for the degradation of bezafibrate in water: Catalyst surface properties characterization and reaction mechanism

“…The corresponding shake-up satellite peaks for these peaks are centered at 781.1 eV [26]. The peaks at 796.9 eV are because of a chemical shift of the main spin-orbit components, because the cobalt cation on the nanocrystal surface chemically interacts with surface hydroxyl groups (-OH) [27]. The surface cobalt loading on RM led to the formation of Co 3 O 4 on the surface.…”

Nickel on alumina catalysts for the production of hydrogen rich mixtures via the biogas dry reforming reaction: Influence of the synthesis method

“…This means that an almost equal portion of the alumina's surface sites is negatively charged (acidic sites) and thus available to the adsorption of the positively charged Ni species. Moreover, as the deposition of the Ni(H 2 O) 6 2þ ions onto the alumina surface causes a decrease in the pH of the suspension, we fed the pH control system with a suitable amount of the NH 4 OH solution (i.e., to keep the pH at 7.0) [50]. However, it can be said that following the modified-EDF methodology, the deposition of NiO x species on the alumina takes place mainly via adsorption of [Ni(H 2 O) 6 ] 2þ on the negatively charged surface sites.…”

Cobalt supported on alumina as green catalyst for Biginelli reaction in mild conditions: effect of catalyst preparation method

“…Similar XRD patterns were observed for both 10CoAl-ME and 10CoAl-IMP ( Figure 2A) with intense lines assigned to the CoAl 2 O 4 spinel phase, crystallized in a cubic structure (2θ = 31°, 36°, 38°, 44°, 56°, 59° and 65°) and characteristic lines of the Co 3 O 4 phase, crystallized in a cubic phase (2θ = 31°, 3°8, 51°, 56°, 58°, 67°). NiAl 2 O 4 spinel was already observed in the case of nickel supported on alumina [46] and the Co 3 O 4 phase was also observed in the case of Co supported on Al 2 O 3 prepared by IMP and ME [47,48]. For the IMP cobalt sample, another peak at 2θ = 39° was observed, which was attributed to CoO.…”