Towards a Correlation Between Iron/Cobalt Content, Support Pore Size and Metal Particle Size in Supported Catalysts
Source abstract
Abstract
Abstract Fe−Co‐based catalysts supported on γ‐Al2O3, Aerosil 200 silica and zeolite 4A were prepared by co‐precipitation of the respective nitrates in the presence of ammonium hydroxide. The objective was to demonstrate the influence of Fe/Co mass ratio and support pore size on metal particle size. Catalysts were characterized by thermogravimetric analysis (TGA), X‐ray diffraction (XRD), N2 physisorption, Fourier‐transformed infrared spectroscopy (FTIR), and scanning (SEM) and transmission (TEM) microscopies. It was demonstrated that the minimal presence of Fe was enough to reduce the average particle diameters by half. Increasing Fe content did not cause proportional decreases in the average particle diameter. The support pore diameter probably played a role in the crystallization step of bimetallic and Fe monometallic catalysts, whose particle diameters were similar to those observed for the pores. This phenomenon was not observed for Co monometallic catalysts.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Catalytic Processes in Materials Science · Catalysis and Hydrodesulfurization Studies · Nanomaterials for catalytic reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Graduate Program in Chemical Engineering Federal University of Paraná Av. Coronel Francisco Heráclito dos Santos, 100 Curitiba/PR 81531-980 Brazil
Graduate Program in Forest Engineering Federal University of Paraná Avenida Lothário Meissner, 632 Curitiba/PR 80210-170 Brazil
NMR Laboratory, Institute of Chemistry Federal University of Goiás Avenida Esperança s/n, Câmpus Samambaia Goiânia/GO 74690-900 Brazil
Department of Pharmacy University of Brasília Campus Universitário Darcy Ribeiro Brasília/DF 70910-900 Brazil
Department of Chemical Engineering Federal University of Paraná Av. Coronel Francisco Heráclito dos Santos, 100 Curitiba/PR Brazil
Department of Chemical Engineering Federal University of Paraná Av. Coronel Francisco Heráclito dos Santos, 100 Curitiba/PR 81531-980 Brazil
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