A3 – Reactivity and advanced electron microscopy of mass selected clusters deposited on oxide supports

Objective

Mass selected Pt, Pd and Pt-Pd clusters/particles with a narrow size distribution in the range of 50-2000 atoms are deposited on different well defined substrates using a soft landing approach as well defined model systems for catalysis and tested in a specially designed reaction chamber. The structure of selected systems is characterized by in situ electron microscopy in defined gas atmospheres. Size distribution, shape, morphology, composition, atomic structure and substrate interaction as well as their evolution are determined under selected conditions relevant for emission control in order to correlate structure and catalytic activity.

Project-related publications by participating researchers

Prof. Dr. Christian Kübel

W. Wang, A. Villa, C. Kübel, D. Wang, Tailoring the 3D structure of Pd nanocatalysts supported on mesoporous carbon for furfural hydrogenation, ChemNanoMat, 2018, 4, 1125-1132

DOI: 10.1002/cnma.201800308

C.N. Shyam Kumar, V.S.K. Chakravadhanula, A. Riaz, S. Dehm, D. Wang, X. Mu, B. Flavel, R. Krupke, C. Kübel, Understanding graphitization and growth of free-standing nanocrystalline graphene using in situ transmission electron microscopy, Nanoscale, 2017, 9, 12835-12842

DOI: 10.1039/C7NR03276E

S. Baier, A. Wittstock, C.D. Damsgaard, A. Diaz, J. Reinhardt, F. Benzi, J. Shi, T. Scherer, D. Wang, C. Kübel, C.G. Schroer, J.-D. Grunwaldt, Influence of gas atmosphere and ceria on the stability of nanoporous gold studied by environmental electron microscopy and in situ ptychography, RSC Adv. 2016, 6, 83031-83043

DOI: 10.1039/C6RA12853J

A. Villa, C.E. Chan-Thaw, S. Campisi, C.L. Bianchi, D. Wang, P.G. Kotula, C. Kübel, L. Prati, AuRu/AC as an effective catalyst for hydrogenation reactions, Phys. Chem. Chem. Phys. 2015, 15, 28171-28176

DOI: 10.1039/C5CP00632E

X. Mu, D. Wang, F. Tao, C. Kübel, Radial distribution function imaging by STEM diffraction: Phase mapping and analysis of heterogeneous nanostructured glasses, Ultramicroscopy2016, 168, 1-6

DOI: 10.1016/j.ultramic.2016.05.009

Prof. Dr.-Ing. Horst Hahn

A. Fischer, R. Kruk, H. Hahn, A versatile apparatus for the fine-tuned synthesis of cluster-based materials, Rev. Sci. Instrum. 2015, 86, 2

DOI: 10.1063/1.4908166

C. Benel, A. Fischer, A. Zimina. R. Steininger. R. Kruk, H. Hahn, A. Leon, Controlling the structure and magnetic properties of cluster-assembled metallic glasses, Mater. Horiz. 2019, 6, 727-732

DOI: 10.1039/C8MH01013G

A. Fischer, R. Kruk, D. Wang, H. Hahn, Magnetic properties of iron cluster/chromium matrix nanocomposites, Beilstein J. Nanotechnol. 2015, 6, 1158-1163

DOI: 10.3762/bjnano.6.117

C. Benel, T. Reisinger, R. Kruk, H. Hahn, Cluster-assembled nanocomposites: Functional properties by design, Adv. Mater. 2018, 1806634

DOI: 10.1002/adma.201806634

H. Gleiter, Th. Schimmel, H. Hahn, Nanostructured solids – From nano-glasses to quantum transistors, Nano Today, 2014, 9, 17-68

DOI: 10.1016/j.nantod.2014.02.008