B2 - Project title: Systematic Synthesis and Catalytic Performance Tests of Defined Noble Metal Species on Powder Supports

Objective

This project addresses the influence of noble metal particle size/composition and morphology of the support on the catalyst performance and its activation/deactivation/reactivation behavior under model and realistic reaction conditions. Model catalysts will be prepared following the ‘precursor concept’, i.e. mono- and bimetallic clusters or particles of defined size are synthesized by new chemical procedures in solution, and anchored on support oxide. Light-off/light-out profiles (CH₄/CO/NO oxidation and NO reduction) under model reaction conditions and advanced performance tests and kinetic studies during rapid gas mixture and temperature variations will be systematically conducted.

Project-related publications by participating researchers

Project- and subject-related list of publications
S. Chen, X. Huang, D. Schild, D. Wang, C. Kübel, S. Behrens, Pd–In intermetallic nanoparticles with high catalytic selectivity for liquid-phase semi-hydrogenation of diphenylacetylene. Nanoscale 2022, 14 (47), 17661-17669. DOI: 10.1039/D2NR03674F
A. M. Gänzler, B. Betz, S. Baier-Stegmaier, S. Belin, V. Briois, M. Votsmeier, M. Casapu, Operando X-ray Absorption Spectroscopy Study During Conditioning of Pt-Based Catalysts and Its Implications for CO Oxidation. J. Phys. Chem. C 2020, 124 (37), 20090-20100. DOI: 10.1021/acs.jpcc.0c04740
A. Gremminger, J. Pihl, M. Casapu, J.-D. Grunwaldt, T. J. Toops, O. Deutschmann, PGM based catalysts for exhaust-gas after-treatment under typical diesel, gasoline and gas engine conditions with focus on methane and formaldehyde oxidation. Appl. Catal. B 2020, 265, 118571. DOI: 10.1016/j.apcatb.2019.118571
M. Liebertseder, D. Wang, G. Cavusoglu, M. Casapu, S. Wang, S. Behrens, C. Kübel, J.-D. Grunwaldt, C. Feldmann, NaCl-template-based synthesis of TiO2-Pd/Pt hollow nanospheres for H₂O₂ direct synthesis and CO oxidation. Nanoscale 2021, 13 (3), 2005-2011, 10.1039/D0NR08871D. DOI: 10.1039/D0NR08871D
P. Lott, M. Casapu, J.-D. Grunwaldt, O. Deutschmann, Exhaust gas after-treatment of lean-burn natural gas engines–from fundamentals to application. Appl. Catal. B 2023, 123241. DOI: 10.1016/j.apcatb.2023.123241
F. Maurer, J. Jelic, 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
F. Maurer, A. Beck, J. Jelic, W. Wang, S. Mangold, M. Stehle, D. Wang, P. Dolcet, A. M. Gänzler, C. Kü bel, 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
D. I. Sharapa, D. E. Doronkin, F. Studt, J.-D. Grunwaldt, S. Behrens, Moving Frontiers in Transition Metal Catalysis: Synthesis, Characterization and Modeling. Adv. Mater. 2019, 31 (26), e1807381. DOI: 10.1002/adma.201807381
C. Schmitt, N. Da Roit, M. Neumaier, C. Maliakkal, D. Wang, T. Henrich, C. Kübel, M. Kappes, S. Behrens Continuous flow synthesis of atom-precise platinum clusters. Nanoscale Adv. 2024. DOI: 10.1039/D4NA00074A
L. Warmuth, G. Nails, M. Casapu, S. Wang, S. Behrens, J.-D. Grunwaldt, C. Feldmann, Catalytic CO Oxidation and H₂O₂ Direct Synthesis over Pd and Pt-Impregnated Titania Nanotubes. Catalysts 2021, 11. DOI: 10.3390/catal11080949

Project- and subject-related list of publications

S. Chen, X. Huang, D. Schild, D. Wang, C. Kübel, S. Behrens, Pd–In intermetallic nanoparticles with high catalytic selectivity for liquid-phase semi-hydrogenation of diphenylacetylene. Nanoscale 2022, 14 (47), 17661-17669.

DOI: 10.1039/D2NR03674F

A. M. Gänzler, B. Betz, S. Baier-Stegmaier, S. Belin, V. Briois, M. Votsmeier, M. Casapu, Operando X-ray Absorption Spectroscopy Study During Conditioning of Pt-Based Catalysts and Its Implications for CO Oxidation. J. Phys. Chem. C 2020, 124 (37), 20090-20100.

DOI: 10.1021/acs.jpcc.0c04740

A. Gremminger, J. Pihl, M. Casapu, J.-D. Grunwaldt, T. J. Toops, O. Deutschmann, PGM based catalysts for exhaust-gas after-treatment under typical diesel, gasoline and gas engine conditions with focus on methane and formaldehyde oxidation. Appl. Catal. B 2020, 265, 118571.

DOI: 10.1016/j.apcatb.2019.118571

M. Liebertseder, D. Wang, G. Cavusoglu, M. Casapu, S. Wang, S. Behrens, C. Kübel, J.-D. Grunwaldt, C. Feldmann, NaCl-template-based synthesis of TiO2-Pd/Pt hollow nanospheres for H₂O₂ direct synthesis and CO oxidation. Nanoscale 2021, 13 (3), 2005-2011, 10.1039/D0NR08871D.

DOI: 10.1039/D0NR08871D

P. Lott, M. Casapu, J.-D. Grunwaldt, O. Deutschmann, Exhaust gas after-treatment of lean-burn natural gas engines–from fundamentals to application. Appl. Catal. B 2023, 123241.

DOI: 10.1016/j.apcatb.2023.123241

F. Maurer, J. Jelic, 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

F. Maurer, A. Beck, J. Jelic, W. Wang, S. Mangold, M. Stehle, D. Wang, P. Dolcet, A. M. Gänzler, C. Kü bel, 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

D. I. Sharapa, D. E. Doronkin, F. Studt, J.-D. Grunwaldt, S. Behrens, Moving Frontiers in Transition Metal Catalysis: Synthesis, Characterization and Modeling. Adv. Mater. 2019, 31 (26), e1807381.

DOI: 10.1002/adma.201807381

C. Schmitt, N. Da Roit, M. Neumaier, C. Maliakkal, D. Wang, T. Henrich, C. Kübel, M. Kappes, S. Behrens Continuous flow synthesis of atom-precise platinum clusters. Nanoscale Adv. 2024.

DOI: 10.1039/D4NA00074A

L. Warmuth, G. Nails, M. Casapu, S. Wang, S. Behrens, J.-D. Grunwaldt, C. Feldmann, Catalytic CO Oxidation and H₂O₂ Direct Synthesis over Pd and Pt-Impregnated Titania Nanotubes. Catalysts 2021, 11.

DOI: 10.3390/catal11080949

Project Area B - Porous catalysts