C2 – Catalytic monoliths with narrow particle size distribution in washcoats with well-defined gradients

Objective

This project aims at developing advanced washcoated monoliths as catalysts for studies under transient operating conditions, bridging the gap between model catalysts and more realistic reactor systems. The best candidates for both the supports (with defined morphology) and noble metal clusters/particles are used for the preparation of the washcoat of monoliths. This requires the scaling-up of promising nanoparticle preparation routes with narrow size distribution, targeted washcoat preparation and zone and dual layer coating. The resulting coated monoliths serve as basis for X-ray microscopy, spatially resolved catalytic and structural studies and transient lab and engine bench tests.

Project-related publications by participating researchers

Prof. Dr. Jan-Dierk Grunwaldt

J.-D. Grunwaldt, J. B. Wagner, R. E. Dunin-Borkowski, Imaging catalysts at work: A hierarchical approach from the macro- to the meso- and nano-scale. ChemCatChem, 2012, 5, 62-80

DOI: 10.1002/cctc.201200356

G. Tofighi, H. Lichtenberg, J. Pesek, T. L. Sheppard, W. Wang, L. Schöttner, G. Rinke, R. Dittmeyer, J.-D. Grunwaldt, Continuous microfluidic synthesis of colloidal ultrasmall gold nanoparticles: in situ study of the early reaction stages and application for catalysis. React. Chem. Eng. 2017, 2, 876-884

DOI: 10.1039/C7RE00114B

M. Tepluchin, S. Kureti, M. Casapu, E. Ogel, S. Mangold, J.-D. Grunwaldt, Study on the hydrothermal and SO2 stability of Al2O3-supported manganese and iron oxide catalysts for lean CO oxidation, Catal. Today, 2015, 258, 498-506

DOI: 10.1016/j.cattod.2015.01.010

A. Gremminger, P. Lott, M. Merts, M. Casapu, J. -D. Grunwaldt, O. Deutschmann, Sulfur poisoning and regeneration of bimetallic Pd-Pt methane oxidation catalyst, Appl. Catal. 2017, 218, 833-843

DOI: 10.1016/j.apcatb.2017.06.048

G. Hofmann, A. Rochet, E. Ogel, M. Casapu, S. Ritter, M. Ogurreck, J.-D. Grunwaldt, Aging of a Pt/Al2O3 exhaust gas catalyst monitored by quasi in situ X-ray micro computed tomography. RSC Adv. 2015, 5, 6893-6905

DOI: 10.1039/C4RA14007A

Prof. Dr. Silke Behrens

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, 1807381

DOI: 10.1002/adma.201807381

M. Gentzen, D. E. Doronkin, T. L. Sheppard, A. Zimina, H. Li, J. Jelic, F. Studt, J.-D. Grunwaldt, J. Sauer, S. Behrens, Supported intermetallic PdZn nanoparticles as bifunctional catalysts for the direct synthesis of dimethyl ether from CO-rich synthesis gas, Angew. Chem. Int. Ed. 2019, 58, 15655-15659

DOI: 10.1002/anie.201906256

M. Gentzen, D.E. Doronkin, T.L. Sheppard, J.-D. Grunwaldt, J. Sauer, S. Behrens, An intermetallic Pd2Ga nanoparticle catalyst for the single step conversion of CO-rich synthesis gas to dimethyl ether, Appl. Catal. A2018, 562, 206-214

DOI: 10.1016/j.apcata.2018.04.018

A. Llevot, B. Monney, A. Sehlinger, S. Behrens, M. A. R. Meier, Highly efficient Tsuji–Trost allylation in water catalyzed by Pd-nanoparticles, Chem. Commun. 2017, 53, 5175-5178

DOI: 10.1039/C7CC02380D

S. Behrens, G. Spittel, A new palladium nanoparticle catalyst on mesoporous silica prepared from a molecular cluster precursor, Dalton Trans. 2005, 868-873

DOI: 10.1039/B415665J