Study of the activation of catalytic surfaces of metalloxides with typical quantum chemistry methodologies and solid state approaches

Abstract

The target of the present thesis was to investigate the nucleophilic adsorption of small molecules at the surface of magnesia. We tried to determine the electronic structure of the bulk as well as of the surface of the crystal, and to compare it with the electronic structure when there is an adsorbed molecule on the surface. We tried to locate the characteristics that affect the ease and geometry of that adsorption. Finally we compared the results of the quantochemical calculations with the results of the solid state calculations. The quantochemical calculations were mainly performed at PM3 level, which is known to provide good results when it comes to geometry and charges. Some calculations at HF and DFT level were also performed. The solid state calculations were performed at LCAO and DFT level. There were also calculations of the cellular method within the tight binding approximation. For that purpose a special program was developed. On the crystal 4 zones are observed. The first on ...
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DOI
10.12681/eadd/20187
Handle URL
http://hdl.handle.net/10442/hedi/20187
ND
20187
Alternative title
Μελέτη της ενεργοποίησης καταλυτικών επιφανειών μεταλλοξειδίων με τυπικές κβαντοχημικές μεθοδολογίες και θεωρητικές προσεγγίσεις στερεάς κατάστασης
Author
Lefkidis, Georgios (Father's name: Alexandros)
Date
2002
Degree Grantor
Aristotle University Of Thessaloniki (AUTH)
Committee members
Κατσούλος Γεώργιος
Τσίπης Κωνσταντίνος
Σιγάλας Μιχαήλ
Κεσίσογλου Δημήτριος
Τσιάμης Χρήστος
Καραφίλογλου Παντελής
Μπακαλμπάσης Ευάγγελος
Discipline
Natural SciencesChemical Sciences
Keywords
Magnesia; Solid state; Adsorption; Cellular method; Tight binding approximation; Cristal surface; Periodicity; Diatoms
Country
Greece
Language
Greek
Description
245 σ., im.
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