Characterization by XRD, DRIFT, and MAS NMR Spectroscopies of a Mg2P2O7Catalyst

Characterization of the Structure and Catalytic Activity of Pt/Sepiolite Catalysts

“…We found similar chemical shifts for Mg-OH groups in substrates such as magnesium oxide/magnesium orthophosphate systems, magnesium pyrophosphates, and Pt/MgO catalysts in previous work (24)(25)(26). Solid SP-G2 exhibits two signals: a stronger one at 0.4 ppm and a weaker one at 1.9 ppm.…”

Characterization of Various Magnesium Oxides by XRD and1H MAS NMR Spectroscopy

“…Characterization of the chemical nature of surface active sites and of their properties are two major goals in catalysis research that have so far been pursued by using a variety of physical techniques including IR, visible, UV, and Raman spectroscopies, and ESR, ESCA, EXAFS, and X-ray diffraction (XRD), among others. Specifically, H MAS NMR spectroscopy was recently used for the structural elucidation of alumina (12)(13)(14), titanium oxide (15), vanadium oxide-aluminum orthophosphate systems (16), sepiolites (17), Mg/Ga double-layered hydroxides (18), magnesium pyrophosphate (19), and zeolites (20)(21)(22).…”

Evidence for Struvite in Poultry Litter: Effect of Storage and Drying

“…5 and 6; peak 5 in Table 2). A chemical shift of 0.5 ppm has been reported for amorphous Mg 3 (PO 4 ) 2 (Aramendía et al, 1998a,b), which is a likely candidate in this magnesium‐rich system. The fact that this peak is as narrow as the peaks of calcium phosphate and struvite suggests that this resonance is due to a specific chemical species rather than the unresolved phosphate species usually observed in this chemical shift range (see below).…”