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Identifier |
000454377 |
Title |
Highly active catalysts (Pt,Cu,Ni) supported on MTiO3 for hydrogen evolution |
Alternative Title |
Ενεργοί καταλύτες (Pt,Cu,Ni) πάνω σε MTiO3 για παραγωγή υδρογόνου |
Author
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Σουρή, Άννα Παναγιώτα
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Thesis advisor
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Αρματάς, Γεράσιμος
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Reviewer
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Ρεμεδιάκης, Ιωάννης
Στούμπος, Κωνσταντίνος
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Abstract |
The aim of this master thesis is the synthesis and characterization of highly active catalysts (Pt, Cu, Ni) supported on metal titanates (MTiO3, M: Sr, Ca) in order to be used for hydrogen evolution. Most metal titanate materials traditionally are not active photocatalysts for hydrogen evolution as their band positions are not appropriate. However SrTiO3 (STO) and CaTiO3 (CTO) differ as the minimum of their conduction band is more negative than the reduction potential of hydrogen. Additionally, the pairing with metal or transition metal-based cocatalysts has been proven to remedy high recombination rates, charge dissociation and transportation and the lack of active sites on the catalyst’s surface. Herein, metal titanates STO and CTO were used as support materials for the deposition of highly active metal or transition metal-based cocatalysts like Pt, Ni and Cu. The emphasis thus, is given to the photodeposition of highly active catalysts (Pt, Ni, Cu) supported on STO. Therefore, all the synthesized powders were analyzed by powder X-Ray Diffractometry (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDX), UV-Vis-NIR spectroscopy, Photoluminescence (PL) and impedance spectroscopy. Finally, the powders were tested in photocatalytic water splitting for H2 production, with the highly active catalysts supported on STO increasing the activity and stability of the individual materials under solar and visible irradiation.
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Language |
English |
Subject |
Παραγωγή υδρογόνου |
Issue date |
2023-03-29 |
Collection
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School/Department--School of Sciences and Engineering--Department of Materials Science and Technology--Post-graduate theses
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Type of Work--Post-graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/b/d/b/metadata-dlib-1684917070-669628-20841.tkl
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Views |
614 |