B3 - In situ/operando Characterization of Noble Metal Clusters and Particles on Metal Oxides at Work


This project aims at tracking and correlating the structure and activity of oxide-supported metals under steady and transient reaction conditions. For this purpose, operando X-ray absorption/emission and IR spectroscopy complemented by in situ TEM will be applied to investigate selected catalysts based on Pt, Pd and Pt-Pd nanoparticles deposited on well-defined CeO2, TiO2, and Al2O3 supports under emission control reaction conditions. The complementary techniques will elucidate the impact of fluctuations in the gas feed and temperature on the sintering behavior, oxidation/reduction, redispersion processes, morphology changes of nanoparticles and segregation processes in bimetallic systems.

Project-related publications by participating researchers

Project- and subject-related list of publications

L. Caulfield, Sauter, E., H. Idriss, Y. Wang, C. Wöll, Bridging the Pressure and Materials Gap in Heterogeneous Catalysis: A Combined UHV, In Situ, and Operando Study Using Infrared Spectroscopy. J. Phys. Chem. C 2023, 127 (29), 14023-14029.

DOI: 10.1021/acs.jpcc.3c03567

P. G. Lustemberg, P. N. Plessow, Y. Wang, C. Yang, A. Nefedov, F. Studt, C. Wöll, Ganduglia-Pirovano, M. V. Vibrational frequencies of cerium-oxide-bound CO: A challenge for conventional DFT methods. Phys. Rev. Lett. 2020, 125 (25), 256101.

DOI: 10.1103/PhysRevLett.125.256101

P. G. Lustemberg, C. Yang, Y. Wang, C. Wöll, M. V. Ganduglia-Pirovano, Vibrational frequencies of CO bound to all three low-index cerium oxide surfaces: A consistent theoretical description of vacancy-induced changes using density functional theory. J. Chem. Phys. 2023, 159 (3), 034704.

DOI: 10.1063/5.0153745

V. Marchuk, X. H. Huang, J.-D. Grunwaldt, D. E. Doronkin, Structure sensitivity of alumina- and zeolite-supported platinum ammonia slip catalysts. Catal. Sci. Technol. 2023, 13 (10), 2946-2965.

DOI: 10.1039/d2cy02095e

F. Maurer, A. Beck, J. Jelic, W. Wang, S. Mangold, M. Stehle, D. Wang, P. Dolcet, A. M. Gänzler, C. Kübel, F. Studt, M. Casapu, J.-D. Grunwaldt, Surface Noble Metal Concentration on Ceria as a Key Descriptor for Efficient Catalytic CO Oxidation. ACS Catal. 2022, 12 (4), 2473-2486.

DOI: 10.1021/acscatal.1c04565

F. Maurer, J. Jelic, J. J. Wang, A. M. Gänzler, P. Dolcet, C. Wöll, Y. Wang, F. Studt, M. Casapu, J.-D. Grunwaldt, Tracking the formation, fate and consequence for catalytic activity of Pt single sites on CeO2. Nat. Catal. 2020, 3 (10), 824-833.

DOI: 10.1038/s41929-020-00508-7

B. B. Sarma, F. Maurer, D. E. Doronkin, J.-D. Grunwaldt, Design of Single-Atom Catalysts and Tracking Their Fate Using Operando and Advanced X-ray Spectroscopic Tools. Chem. Rev. 2022, 123 (1), 379-444.

DOI: 10.1021/acs.chemrev.2c00495

M. Scheffler, M. Aeschlimann, M. Albrecht, T. Bereau, H.-J. Bungartz, C. Felser, M. Greiner, A. Groß, C. T. Koch, K. Kremer, W. E. Nagel, M. Scheidgen, C. Wöll, FAIR data enabling new horizons for materials research. Nature 2022, 604 (7907), 635-642.

DOI: 10.1038/s41586-022-04501-x

J. J. Wang, E. Sauter, A. Nefedov, S. Heissler, F. Maurer, M. Casapu, J.-D. Grunwaldt, Y. Wang, C. Wöll, Dynamic Structural Evolution of Ceria-Supported Pt Particles: A Thorough Spectroscopic Study. J. Phys. Chem. B 2022, 126 (21), 9051-9058.

DOI: 10.1021/acs.jpcc.2c02420

C. Wöll, Structure and Chemical Properties of Oxide Nanoparticles Determined by Surface-Ligand IR Spectroscopy. ASC Catalysis 2020, 10 (1), 168-176.

DOI: 10.1021/acscatal.9b04016