C3 - Chemical Imaging of Structured Catalysts using High Resolution X-ray Microscopy and Tomography


This project addresses the structural and chemical complexity of technical emission control catalysts using multimodal and multiscale synchrotron-radiation-based hard X-ray microscopy and tomography, complemented by electron tomography. This allows non-invasive chemical imaging of technical catalysts on all relevant length scales for catalysis from nm to mm. In situ and operando methods will also be used to derive structure-activity relationships, and relate local structure observations to catalyst performance. The rich data output can be used to assist simulation, modelling and kinetic studies.

Project-related publications by participating researchers

Prof. Dr. Christian Schroer

F. Seiboth, A. Schropp, M. Scholz, F. Wittwer, C. Rödel, M. Wünsche, T. Ullsperger, S. Nolte, J. Rahomäki, K. Parfeniukas, S. Giakoumidis, U. Vogt, U. Wagner, C. Rau, U. Boesenberg, J. Garrevoet, G. Falkenberg, E. C. Galtier, H. J. Lee, B. Nagler, C. G. Schroer, Perfect X-ray focusing via fitting corrective glasses to aberrated optics. Nature Commun. 2017, 8, 14623

DOI: 10.1038/ncomms14623

A. Schropp, R. Hoppe, J. Patommel, D. Samberg, F. Seiboth, S. Stephan, G. Wellenreuther, G. Falkenberg, C. G. Schroer, Hard x-ray scanning microscopy with coherent radiation: Beyond the resolution of conventional x-ray microscopes. Appl. Phys. Lett. 2012, 100, 253112

DOI: 10.1063/1.4729942

A. Schropp, P. Boye, A. Goldschmidt, S. Hönig, R. Hoppe, J. Patommel, C. Rakete, D. Samberg, S. Stephan, S. Schöder, M. Burghammer, C. G. Schroer, Non-destructive and quantitative imaging of a nano-structured microchip by ptychographic hard X-ray scanning microscopy. J. Microsc. 2010, 241, 9-12

DOI: 10.1111/j.1365-2818.2010.03453.x

J. Reinhardt, R. Hoppe, G. Hofmann, C. D. Damsgaard, J. Patommel, C. Baumbach, S. Baier, A. Rochet, J.-D. Grunwaldt, G. Falkenberg, C. G. Schroer, Beamstop-based low-background ptychography to image weakly scattering objects. Ultramicroscopy, 2017, 173, 52-57

DOI: 10.1016/j.ultramic.2016.11.005

M. Kahnt, J. Becher, D. Bückner, Y. Fam, T. Sheppard, T. Weissenberger, F. Wittwer, J.-D. Grunwaldt, W. Schwieger, C. G. Schroer, Coupled ptychography and tomography algorithm improves reconstruction of experimental data. Optica, 2019, 6, 1282-1289

DOI: 10.1364/OPTICA.6.001282

Dr. Thomas Sheppard

Y. Fam, T.L. Sheppard, J. Becher, D. Scherhaufer, H. Lambach, S. Kulkarni, T.F. Keller, A. Wittstock, F. Wittwer, M. Seyrich, D. Brueckner, M. Kahnt, X. Yang, A. Schropp, A. Stierle, C. G. Schroer, J.-D. Grunwaldt, A versatile nanoreactor for complementary in situ X-ray and electron microscopy studies in catalysis and materials science. J. Synchrotron Radiat. 2019, 26, 1769-1781

DOI: 10.1107/S160057751900660X

J. Becher, T.L. Sheppard, Y. Fam, S. Baier, W. Wang, D. Wang, S. Kulkarni, T.F. Keller, M. Lyubomirskiy, D. Brueckner, M. Kahnt, A. Schropp, C. G. Schroer, J.-D. Grunwaldt, Mapping the pore architecture of structured catalyst monoliths from nanometer to centimeter scale with electron and X-ray tomographies. J. Phys. Chem. C. 2019, 123, 25197-25208

DOI: 10.1021/acs.jpcc.9b06541

T.L. Sheppard, S.W.T. Price, F. Benzi, S. Baier, M. Klumpp, R. Dittmeyer, W. Schwieger, J.-D. Grunwaldt, In situ multimodal 3D chemical imaging of a hierarchically-structured core@shell catalyst. J. Am. Chem. Soc. 2017, 139, 7855-7863

DOI: 10.1021/jacs.7b02177

Y. Fam, T.L. Sheppard, A. Diaz, T. Scherer, M. Holler, W. Wang, D. Wang, P. Brenner, A. Wittstock, J.-D. Grunwaldt, Correlative multiscale 3D imaging of a hierarchical nanoporous gold catalyst by electron, ion and X-ray nanotomography. ChemCatChem, 2018, 10, 2858-2867

DOI: 10.1002/cctc.201800230

P. Sprenger, T.L. Sheppard, J.-P. Suuronen, A. Gaur, F. Benzi, J.-D. Grunwaldt, Structural evolution of highly active multicomponent catalysts for selective propylene oxidation. Catalysts, 2018, 8, 356

DOI: 10.3390/catal8090356