Freiburg 2024 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 15: Spectroscopy of Metal Clusters
MO 15.7: Vortrag
Mittwoch, 13. März 2024, 16:15–16:30, HS 3042
Metal cluster mediated N2 activation and cleavage — •Gereon Niedner-Schatteburg — Dept. of Chemistry and State Research Center OPTIMAS, RPTU Kaiserslautern-Landau, 67663 Kaisers-lautern
Transition metal clusters (TMC) serve a model systems for chemically active surfaces as e.g. of catalytically active nano particles. Size selected TMCs were characterized before to activate and cleave Dinitrogen (N2) spontaneously and under isothermal cryo conditions [1,2,3]. Here, we report on the current state of understanding and on new findings which elaborate the influence of cluster charge state, and which elaborate on cooperative effects amongst multipe adsorbate molecules on the surface of clusters. We discuss the vailidity of the across-edge above-surface (AEAS) mechanism of N2 cleavage, and we report on current insights of the underlying interactions. Eventually, we show some results on Dihydrogen (H2) activation, and we give reference to initial experiments on N2 - H2 coadsorption [4].
The presentation concludes with an outline of the current and future experimental schedule of TMC investigation in progress.
[1] https://doi.org/10.1039/D0CP06208A
[2] https://doi.org/10.1063/5.0157217
[3] https://doi.org/10.1063/5.0157218
[4] http://dx.doi.org/10.1021/acs.jpclett.8b00093
Keywords: metal clusters; IRPD spectroscopy; DFT modelling; reaction kinetics; XMCD spectroscopy