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Voronoi cells: An interesting and potentially useful cell model for interpreting the small-angle scattering of catalysts
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1983
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EngineeringComputational ChemistrySmall-angle ScatteringChemistryVoronoi Polyhedral CellsMetallic CatalystCatalyst ActivationChemical EngineeringMolecular KineticsBiophysicsMaterials EngineeringMaterials ScienceCatalytic MaterialVoronoi CellsPhysicsCatalyst RecyclingPhysical ChemistryUseful Cell ModelCatalysisQuantum ChemistryCrystallographyVoronoi TesselationsNatural SciencesSurface ScienceHeterogeneous CatalysisInterfacial StudyCatalyst PreparationOperando ExperimentChemical Kinetics
A structural model, based on Voronoi polyhedral cells partly filled with support and metallic catalyst, is proposed for interpreting the small-angle X-ray scattering of heterogeneous catalysts. The model's properties are described, and the model is applied to porous Al 2 O 3 and Pt/porous Al 2 O 3 . Surface areas calculated from the X-ray data by means of the statistical geometry of Voronoi tesselations are found in good agreement with those determined by BET (Brunauer, Emmett & Teller) adsorption methods.