Developing the vapour-solid synthesis of supported, intermetallic nanoparticles for heterogeneous catalysis D. Garstenauer 1,2* and K.W. Richter 1,3 1 Department of Inorganic Chemistry – functional Materials, Faculty of Chemistry, University of Vienna, Austria, 2 Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Austria, 3 X-ray Structure Analysis Centre, Faculty of Chemistry, University of Vienna, Austria *e-mail: daniel.garstenauer@univie.ac.at Development and research of sustainable alternatives for energy utilization is mandatory to deal with the challenges of a steadily increasing demand for enery and associated effects on the climate. Hence, the optimization and development of catalyst materials for respective key reactions play a vital role in current research.[1] Intermetallic nanoparticles possess unique chemical and physical properties, which make them particularly interesting for catalytic applications. The utilization and synthesis optimization for nanoparticulate intermetallic compounds gained increased attention in recent years. The adjustability of intermetallic materials promises high potential in a variety of heterogeneous catalysed reactions.[2] State of the art synthesis approaches often lack flexibility and precise composition control while significantly expand particle size distributions, hindering the broad application of intermetallic nanoparticles in catalysis.[3] A very promising alternative method is the direct vapour solid synthesis of intermetallic nanoparticles by interaction of a metal with high vapour pressure in the gaseous phase with solid metal nanoparticles. In principle, the reaction is driven through the equilibration of a solid component with the vapour of a volatile element. The thermodynamic activity, vapour pressure and thus the product composition are controlled by the reaction temperatures in a temperature gradient. In a present approach, we performed the vapour-solid method to prepare supported Pd‑Zn, Pd‑Te and Ni‑Te nanoparticles. Investigation of the samples was carried out by SEM‑EDX, TEM, powder XRD, tXRF and Gasadsorbtion. The synthesis method was suitable for producing homogeneous intermetallic compounds of precise and predictable composition. The vapour‑solid synthesis is a promising method for the preparation of nanoparticulate intermetallic catalysts. Further metal reactants of interest are the volatile elements Selenium, Antimony and Phosphorus in combination with Nickel, Cobalt, Iron, Gold, Iridium, Platinum, Palladium, Ruthenium and Rhodium. The optimization of the reaction parameters for a generally applicable synthesis strategy will be the key of a successful project. Characterization will include testing of the synthesized nanoparticles in various heterogeneous catalytic reactions. References 1. Y. C. Sharma et al, Renewable and Sustainable Energy Reviews , 74, 2017 , 89-103 2. M. Armbrüster et al, Sci. Technol. Adv. Mater ., 15, 2014 , 034803 3. B.P. Williams, Z. Qi, W. Huang and C. Tsung, Nanoscale, 12, 2020 , 18545-18562
P30
© The Author(s), 2022
Made with FlippingBook Learn more on our blog