Berlin 2024 – scientific programme
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O: Fachverband Oberflächenphysik
O 104: Focus Session: Ultrafast Processes in Organic Semiconductors and Perovskites III (joint session O/CPP)
O 104.4: Talk
Friday, March 22, 2024, 11:15–11:30, MA 004
Probing Site-Specific Photocatalytic Activity of Triazin-Based Graphitic Carbon Nitride via Time-Resolved and Resonant X-Ray Photoelectron Spectroscopy. — •Matz Nissen1, Charlotte Ruhmlieb1, Ivan Baev1, Sebastian Denke1, Lukas Wenthaus3, Dmytro Kutnyakhov3, Nils Wind2, 3, Federico Pressacco3, Jens Buck2, Steffen Palutke4, Marion Kuhlmann3, Günter Brenner3, Kai Rossnagel2,3, Alf Mews1, and Michael Martins1 — 1Universität Hamburg, D — 2Christian-Albrechts-Universität zu Kiel, D — 3DESY, Hamburg, D — 4European XFEL, Hamburg, D
Triazin-Based Graphitic Carbon Nitride (TGCN) has shown potential as a metal-free catalyst for photocatalytic water splitting, utilizing soley a visible light source and water. To gain further insight into the morphology of TGCN and the specific location where water binds during the catalytic reaction, we conducted resonant and time-resolved photoelectron spectroscopy of the carbon and nitrogen sites in a clean and a water environment. These experiments were done at beamline P04 of PETRAIII and beamline PG2 of FLASH respectively. Altering the sample environment shows differences in the resonant maps of the N K-edge. Additionally, time resolved measurements showed an excitation in the nitrogen spectra, specifically in the ring structure of the graphitic system. These results aim to help to improve the catalytic performance of the sample.
Keywords: Photocatalysis; time-resolved; Carbon Nitride