Structure and electronic properties of solid acids based on tungsten oxide nanostructures

Article Abstract:

UV-visible diffuse reflectance and Raman spectroscopies are used to determine the domain size and structure of WO(sub x) species. The acid-catalyzed reaction rates are then analyzed to see if they depend on bonding between WO(sub x) species and WO(sub x) domain size. The results show that the WO(sub x) domain size is controlled only by WO(sub x) surface density and it is not influenced independently by WO(sub x) concentration, oxidation temperature and ZrO(sub 2) surface area.

Usage, Acid-base chemistry, Metallic oxides, Metal oxides, Raman spectroscopy

---

Isotopic tracer studies of propane reactions on H-ZSM5 zeolite

Article Abstract:

A study was conducted to show that the chain growth and cyclization reactions on H-ZSM5 zeolite correlate with the initial formation of the corresponding alkene and its role in the rapid oligomerization/beta-scission reactions before cyclization. Kinetic studies on H-ZSM5 catalysts were carried out in a gradientless recirculating reactor. Results indicated that the occurrence of propane aromatization is influenced by a complex reaction sequence.

Zeolites, Cyclic compounds, Scission (Chemistry), Olefins, Alkenes, Ring formation (Chemistry), Cyclization (Chemistry), Propane

---

Synthesis, structure and catalytic reactivity of isolated V(super 5+)-oxo species prepared by sublimation of VOCl3 onto H-ZSM5

Article Abstract:

Isolated and uniform V(super 5+)-oxo species are grafted onto H-ZSM5 at V/Al(sub f) ratios of 0.2-1 via sublimation of VOCl3 precursors and the structure of grafted V(super 5+)-oxo species is probed by using spectroscopic and titration methods. Sublimation methods led to stable and active V-ZSM5 catalysts for oxidative dehydrogenation (OHD) reactions.

Dehydrogenation, Chemical synthesis, Volumetric analysis, Structure, Chemical properties, Vanadium compounds

Similar abstracts:

• Abstracts: Structures and properties of supramolecular assembled fullerenol/poly (dimethylsiloxane) nanocomposites. Electrical and optical properties of fullerenol langmuir-blodgett films deposited on polyaniline substrates
• Abstracts: Structures and properties of supramolecular assembled fullerenol/poly (dimethylsiloxane) nanocomposites. part 2
• Abstracts: Investigation of the structural and electrochemical properties of size-controlled SnO2 Nanoparticles. New biphenyl derivative with planar phenyl-phenyl conformation in crystal at room temperature exhibits highly efficient UV light-emitting
• Abstracts: Structural and magnetic properties of Fe2O3 nanoparticles dispersed over a silica matrix. Nicotine: On the potential role of ionic liquids for its processing and purification
• Abstracts: Electroless synthesis of Ag nanoparticles on deposited nanostructured Si films

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.