Operando Catalysis

Operando Catalysis

Our goal is to identify activity, selectivity and stability-determining properties of catalysts and to achieve a comprehensive understanding of the interfaces under stationary and dynamic reaction conditions. We study a variety of catalyst systems ranging from well-defined single crystal surfaces, to thin films, supported size and shape-controlled nanoparticles and industrially-relevant powder catalysts.

We are working on the development of tailored size-, shape-selected nanoparticle catalysts and nanostructured thin films either as model systems deposited on e.g. single crystal surfaces or as catalyst-support ensembles.

Our goal is to comprehensively investigate and identify the most important activity-/selectivity-/stability-determining properties and to achieve advanced mechanistic understanding.

Our main laboratory-based in situ and operando techniques include vibrational spectroscopy like electrochemical Raman and FTIR spectroscopy to access surface adsorbates under reaction conditions, or structural analysis using electrochemical (grazing-incidence) X-ray diffraction and X-ray absorption spectroscopy (XAS). Additionally, we apply quasi in situ XPS and NAP-XPS to thoroughly determine the surface chemistry and composition before and after catalysis without any air exposure. We also perform operando electrochemical X-ray absorption spectroscopy in the soft X-ray regime as well as X-ray photoelectron spectroscopy at Bessy II, the synchrotron radiation facility in Berlin.

 

 

Recent Publications

K. Dembélé, J. Wang, M. Boniface, J. Folke, L. Sandoval Diaz, F. Girgsdies, A. Hammud, D. Kordus, G. Koch, Z. Gheisari, R. Blume, W. Jiang, A. Knop-Gericke, R. Eckert, S. Reitmeier, A. Reitzmann, R. Schlögl, B. Roldan Cuenya, J. Timoshenko, H. Ruland and T. Lunkenbein: The Haber Bosch Catalyst from Solid state Chemistry to Mesotechnology. Advanced Energy Materials 2500159 (2025).
J. Timoshenko, D. Kordus, J. Mathiesen, U. Hejral, P. Zeller, G. Behrendt, E. Öztuna, J. Wang, Z. Gheisari, R. Eckert, S. Reitmeier, A. Reitzmann, H. Ruland, J. Folke, T. Lunkenbein and B. Roldan Cuenya: X-ray absorption by a microgranular sample. Physical Review B, in press.
J. Mathiesen, J. Zhu, W. Wan, S.K. Shaikhutdinov and B. Roldan Cuenya: Metal-Support Interaction in In2O3-Based Catalysts of CO2 Hydrogenation Studied Using “Inverse” In2O3(111)/Ru(0001) Model Systems. The Journal of Physical Chemistry C 129 (18), 8582–8590 (2025).

 

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