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Table of contents
Acknowledgements
Abstract
Abbreviations
Contents
Chapter 1: Introduction
1.1 Concerns of the environmental issues
1.2 Hydrogen fuel cells
1.3 Inverse oxide/metal catalysts
1.4 Zinc oxide structures
Polar surface structures of the ZnO crystal
Structures of ultrathin ZnO films
1.5 CO oxidation on the inverse ZnO/Pt(111) catalyst
Chapter 2: Experimental setup
2.1 Electron beam evaporation (e-beam evaporation)
2.2 Scanning tunneling microscopy (STM)
Theory of scanning tunneling microscopy
Description of scanning tunneling microscopy
Fabrication and cleaning of the tip for scanning tunneling microscopy
2.3 Scanning tunneling spectroscopy (STS)
2.4 Low-energy electron diffraction (LEED)
Description of low-energy electron diffraction
Theory of low-energy electron diffraction
Surface structures
2.5 Near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS)
Principle of X-ray photoelectron spectroscopy
Description of X-ray photoelectron spectroscopy
Description of near-ambient pressure X-ray photoelectron spectroscopy
2.6 Quadrupole mass spectrometer (QMS)
Chapter 3: Fabrication of ZnO thin films on Pt(111)
3.1 Preparation of the Pt(111) substrate
3.2 Preparation of ZnO films on Pt(111)
3.3 Electronic properties of ZnO films on Pt(111)
3.4 Summary and conclusions
Chapter 4: Morphology evolution of ZnO films on Pt(111) under CO oxidation conditions
Summary and conclusions
Chapter 5: CO oxidation mechanisms at the ZnO/Pt(111) model catalyst
5.1 NAP-XPS setup as a flow reactor
5.2 QMS molar fractions for the plain Pt(111) and the ZnO/Pt(111) surfaces
5.3 CO oxidation reaction on the plain Pt(111) surface
5.4 CO oxidation reaction on the ZnO/Pt(111) surface
5.5 Carboxyl/formate species, reaction intermediates or spectators?
5.6 Summary and conclusions
Chapter 6: Conclusion and perspectives
6.1 Conclusions
6.2 Perspectives
Appendix: Synthesis of the large-diameter ZnTe crystal for THz emitting and detection
Introduction
Experimental setup
Results and discussion
Conclusions
References
