研究目的
To identify the structural features and catalytic behavior of new materials in the peroxidation of sulfur-containing aromatic compounds and the oxidative desulfurization of hydrocarbons.
研究成果
Laser electrodispersion of targets made from pressed mixtures of Ni and Mo or W powders allowed us to obtain bimetallic nanostructured coatings with given ratios of mixture components and their uniform distribution over the surfaces of aluminum oxide granules. The coating components were present on the surfaces of samples in the metallic and oxidation states, in the form of nanoparticles of 4–7 nm in size. The degrees of conversion of the initial substrates on them were comparable to or even exceeded the values obtained on known catalysts with substantially higher metal contents.
研究不足
The technical and application constraints of the experiments include the need for highly specialized equipment for LED and the potential for partial washout of the metallic coating without the use of a zwitterionic liquid.
1：Experimental Design and Method Selection:
Laser electrodispersion (LED) was used to form bimetallic coatings based on Ni and Mo or W on surfaces of aluminum oxide, using tightly pressed two-component mixtures of powders as targets.
2：Sample Selection and Data Sources:
Two types of γ-Al2O3 that differ in granule size were used: AI-05 and AOK-63-11 of grade B.
3：List of Experimental Equipment and Materials:
JEOL JSM 6000 NeoScope and JEOL JEM 2100F/UHR instruments for SEM and TEM, Autosorb 1 instrument from Quantachrome for textural characteristics, Axis Ultra DLD spectrometer for XPS.
4：Experimental Procedures and Operational Workflow:
Bimetallic catalysts NiMo/Al2O3 and NiW/Al2O3 were obtained by depositing nanoparticles onto Al2O3 granules via LED in a special cell. The catalytic properties were determined in model reactions of the peroxide oxidation of thiophene and dibenzothiophene.
5：Data Analysis Methods:
The size of the deposited phases was estimated as the maximum linear size. A qualitative analysis of the surface was performed in situ by means of energy dispersive analysis (EDA).
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