In situ monitoring of NiO–Al2O3 nanoparticles synthesis by thermo-Raman spectroscopy

The preferential oxidation of CO in hydrogen rich streams over platinum doped nickel oxide catalysts

“…The morphology of the particles is spherical and rod-shaped with minimum aggregation, relating closely to data obtained by Ghule et al [42]. For the Ni-Al catalyst (Fig.…”

“…For the Ni-Al catalyst (Fig. 9B), the NiO particles are more distinctly pronounced and visible, due to the catalyst being more crystalline [42]. For the Pt-Al (Fig.…”

Comparison of Ni and Ni–Ce/Al2O3 catalysts in granulated and structured forms: Their possible use in the oxidative dehydrogenation of ethane reaction

“…The monometallic oxide catalyst shows a broad and asymmetrical band at 500-550 cm À1 region corresponding to the stretching of Ni-O bond (first order phonons). The location of this band, which shifted to higher frequencies with respect to the bulk nickel oxide, is associated with a strong interaction between the Al 2 O 3 support and the nickel species, in agreement with TPR and XPS results [27]. A small shoulder at $400 cm À1 assigned to material surface vacancies and weak bands at 700 and 1080 cm À1 associated with second order phononic modes of nickel oxide were also present [28].…”

Optimization of catalytic hydrodeoxygenation of oleic acid into biofuel using fluoroplatinum oxalate zeolite supported catalyst

“…These observed multiple stretches is similar to the aggressive peaks and multiple background noise-like vibrations which previous report have attributed to the presence of organic functional group [29]. According to recent studies [29,34,37] using Raman spectroscopic techniques, absorption and adsorption mechanisms have been identified as means of active metal incorporation into supports. Absorption is characteristics of low oxidation state metals that can be accommodated into the surface of the support to form a surface spinel and they usually possess Raman bands between $300 and 800 cm À1 .…”