Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 81: Catalysis and surface reactions II
O 81.5: Vortrag
Donnerstag, 12. März 2026, 11:30–11:45, TRE/MATH
Experimental Modelling of Ti-based (Photo-)Catalysts for the Activation of Greenhouse Gasses — •Lars Mohrhusen — Carl von Ossietzky Universität Oldenburg, Germany
Sustainable catalysts are key materials for future energy technologies and the activation of greenhouse gasses via thermal and photo-catalysis. To replace critical raw materials such as (noble) metals in (photo-)catalysts, we combine low-dimensional (semi-)metallic structures such as point defects or 2D materials with oxides to hybrid materials. Combined insights from spectroscopy, microscopy and reactivity studies on well-defined model systems under UHV or so-called operando conditions gains a comprehensive atomistic picture.1−3
Selected examples for such Ti-based materials relevant for solar photocatalysis will be presented. Therein, the activation of greenhouse gas molecules (esp. N2O and CO2) on Ti3+ and Ti2+ defects will be illuminated.3,4 While such gases interact weakly with defective rutile TiO2 in UHV, higher pressures of CO2 combined with the presence of water as an H donor were found to enable a rich reduction chemistry along multiple parallel pathways in operando-XPS.4 In addition to oxides, nanostructured 2D titanium disulphide (TiS2) as well as conjugated organic polymers on metal and oxide surfaces represent potential candidates for photocatalytic applications.5
[1] L. Mohrhusen et al., J. Phys. Chem. C 2022, 126, 48, 20332. [2] L. Mohrhusen et al., Small 2024, 2405715. [3] L. Mohrhusen K. Al-Shamery, Catal. Lett. 2023, 153, 2, 321. [4] J. Klimek, et al. under review [5] N. Kruse et al. Small 2025, 38, e06023.
Keywords: (Photo-)Catalysis; in-situ Spectroscopy; Oxides; Sulfides; 2D Materials