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Study of 3-phase catalytic layers for polymer electrolyte fuel cells and electrolysers
Fuka, Šimon ; Matolínová, Iva (advisor) ; Khalakhan, Ivan (referee)
Title: Study of 3-phase catalytic layers for polymer electrolyte fuel cells and electrolysers Author: Šimon Fuka Department: Department of Surface and Plasma Science Supervisor: doc. Mgr. Iva Matolínová, Dr., Department of Surface and Plasma Science Abstract: The diploma thesis focuses on the study of catalytic layers for Proton Exchange Membrane Fuel Cells (PEMFC) or electrolyzers based on the mixture of platinum and cerium oxide. These layers are prepared by using magnetron sputtering, their properties are studied depending on the deposition parameters or the choice of the substrate by using SEM, AFM, XPS and then tested as an anode in the fuel cell. In addition to the morphology of the catalytic layers, it has been shown that the dispersion of very small nanoparticles of the catalyst with a size of 1-2 nm has a great effect on PEMFC performance. Most of the prepared samples gave maximal and maximal specific performance much higher than the state of art values published for Pt-CeOx system. By studying properties of the layers used as the anode catalysts, this work contributes to the understanding of PEMFC fuel cell behavior and, consequently, to its potential commercialization. Keywords: Fuel cell, cerium oxide, platinum, catalyst, magnetron sputtering
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Investigation of membrane electrode assembly (MEA) for fuel cells
Fuka, Šimon ; Matolínová, Iva (advisor) ; Vorokhta, Mykhailo (referee)
Title: Investigation of membrane electrode assembly (MEA) for fuel cells Author: Šimon Fuka Department: Department of surface and plasma science Supervisor: doc. Mgr. Iva Matolínová, Dr., Department of surface and plasma science Abstract: This bachelor thesis is focused on the study of degradation of the fuel cell, specifically on the study of the catalyst diffusion into the membrane and of the chemical and morphological changes at the interface. The catalyst is prepared by magnetron sputtering directly on the membrane. Morphological changes at the interface will be monitored either by scanning electron microscope (SEM) or by using the focused ion beam (FIB). Diffusion of the catalyst will be observed using energy-dispersive X-ray spectroscopy (EDX). The bachelor thesis will contribute to the lifetime of the fuel cell type PEMFC (proton exchange membrane fuel cell). Keywords: Catalyst, Diffusion, Membrane, Fuel cell, SEM
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