Insights into the catalytic activity of nitridated fibrous silica (KCC-1) nanocatalysts from (15) N and (29) Si NMR spectroscopy enhanced by dynamic nuclear polarization.

Insights into the Catalytic Activity of Nitridated Fibrous Silica (KCC-1) Nanocatalysts from N and Si NMR Spectroscopy Enhanced by Dynamic Nuclear Polarization**

TEM Investigations of Pt-NPs Loaded Fibrous Nano-Catalyst Support KCC-1

Nanocatalysts include solid-state heterogeneous catalysts whose dimensions are in the nanometer length scale [1]. This type of catalysts can decrease the energy usage in the chemical processes that ultimately leads to a greener chemical industry. There are many different types of supports that are used to carry these catalysts but generally the ones with higher surface area are preferred becaus...

From single-site tantalum complexes to nanoparticles of Ta x N y and TaO x N y supported on silica: elucidation of synthesis chemistry by dynamic nuclear polarization surface enhanced NMR spectroscopy and X-ray absorption spectroscopy.

Air-stable catalysts consisting of tantalum nitride nanoparticles represented as a mixture of Ta x N y and TaO x N y with diameters in the range of 0.5 to 3 nm supported on highly dehydroxylated silica were synthesized from TaMe5 (Me = methyl) and dimeric Ta2(OMe)10 with guidance by the principles of surface organometallic chemistry (SOMC). Characterization of the supported precursors and the s...

Atomic Description of the Interface between Silica and Alumina in Aluminosilicates through Dynamic Nuclear Polarization Surface-Enhanced NMR Spectroscopy and First-Principles Calculations

Despite the widespread use of amorphous aluminosilicates (ASA) in various industrial catalysts, the nature of the interface between silica and alumina and the atomic structure of the catalytically active sites are still subject to debate. Here, by the use of dynamic nuclear polarization surface enhanced NMR spectroscopy (DNP SENS) and density functional theory (DFT) calculations, we show that o...

The Effect of Different Supports on the ‎Characteristic and Catalytic Properties of ‎ Ni-Mo/Cs1.5H1.5PW12O40/S (S= SiO2 or Al2O3 or ‎ASA) Nanocatalysts in Hydrocracking of n-‎decane

   In this research, Ni-Mo/Cs1.5H1.5PW12O40/S (S=SiO2 or Al2O3 or ASA (amorphous silica alumina)) nanocatalysts with different supports were prepared via 2 steps with impregnation method and the effect of support on the characteristic and catalytic properties of the prepared samples was studied. The synthesized sam...