Surface Science Studies of a NOx-removal Model Catalyst

PhD defence, Friday 13 October 2017, Stig Koust Hansen

2017.10.13 | Helle Karvonen

Stig Koust Hansen

The emission of harmful nitrogen oxide (NOx) gases has increased drastically over the last decades. Recently, the VW emission scandal highlighted these problems regarding NOx emission. Nowadays, industrial catalysts based on the materials vanadium oxide (VOx) and titanium dioxide (TiO2) are applied for the removal and abatement of NOx.

Stig Koust worked towards developing a catalyst that mimics industrial conditions, a so-called “model catalyst”, which could be applicable for surface science studies. During his studies, he researched the interaction between various molecules present during the catalytic reaction (e.g. oxygen, water and ammonia) and the surface of the model catalyst by atomically-resolved scanning tunneling microscopy and X-ray photoemission spectroscopy.
This model system could potentially help unraveling and identifying the nature of the active sites in the NOx-removal reaction, leading to more efficient catalysts.

The PhD degree was completed at the Interdisciplinary Nanoscience Center (iNANO), Science and Technology, Aarhus University.

This résumé was prepared by the PhD student.

Time: Friday 13 October 2017 at 13.15
Place: 1593-012,  (aud.),  iNANO, Gustav Wieds Vej 14, Aarhus University, 8000 Aarhus C.
Title of dissertation: Vanadium oxide supported on Anatase TiO2 (101): Development of a Model Catalyst
Contact information: Stig Koust, e-mail:, tel.: +45 61606917
Members of the assessment committee:
Senior Scientist Zdenek Dohnalek, Chemical Structure and Dynamics Department Pacific Northwest National Laboratory, USA
Senior Scientist Paola Luches, Institute of Nanoscience (CNR), Italy
Associate Professor Liv Hornekær (chair), iNANO and Department of Physics and Astronomy, Aarhus University
Main supervisor:
Associate Professor Jeppe Vang Lauritsen, iNANO and Deoartment of Physics and Astronomy, Aarhus University
Senior Researcher Stefan Wendt, iNANO, Aarhus University

Professor Flemming Besenbacher, iNANO, Aarhus University
Language: The PhD dissertation will be defended in English

The defence is public.
The dissertation is available for reading at the Graduate School of Science and Technology/GSST, Ny Munkegade 120, building 1520, rooms 128-134, 8000 Aarhus C.

PhD defence
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Revised 23.10.2017