Conveners
In situ / in operando studies
- Claudia Weidenthaler (Max-Planck-Institut für Kohlenforschung, Heterogeneous Catalysis)
In situ / in operando studies
- Claudia Weidenthaler (Max-Planck-Institut für Kohlenforschung, Heterogeneous Catalysis)
Zirconium dioxide (ZrO2) has been of major industrial and scientific interest over the past decades for its wide range of applications, in particular thanks to its catalytic properties. Regardless the multiple synthesis routes employed, undoped bulk ZrO2 is stabilized in the monoclinic structure (m-ZrO2) at ambient temperature and atmospheric pressure. However, these last years, studies showed...
2D materials are considered as unique class of modern materials. Understanding the mechanisms behind the exfoliation processes enables us to significantly enhance processing potential of 2D materials. In-situ synchrotron X-ray characterization is employed to study the temporal changes of hexagonal-boron nitride (h-BN) while its initial processing from bulk 3D crystalline material towards its...
Oxide-supported nanoparticles are important heterogeneous catalysts. The nanoparticles shapes and type of facets are decisive for the catalyst activity and lifetime. During a catalytic reaction, the nanoparticle may be subject to shape changes, and segregation in alloys may adjust the termination of the surface to a changing gas environment.
Here we report on the evolution of the 3D strain...
Selective in-situ exsolution of catalytically active metals from doped perovskites during methane dry reforming
Florian Schrenk, Lorenz Lindenthal, Hedda Drexler, Raffael Rameshan, Christoph Rameshan
Institute of Materials Chemistry, Technische Universität Wien, Austria
Perovskite type oxides, doped with catalytically active metals, have shown great potential to catalyse MDR...
The targeted control of particle/crystallite size, crystallinity, and polymorphism is of crucial importance for many functional materials, in particular quantum materials$^\text{1}$. They are frequently synthesized by the facile sol-gel method which in a broader sense can be described as the conversion of molecular precursors in solution into inorganic solids via hydrolysis, condensation, and...
The performance of magnetite-based devices and catalysts crucially depends on their surface structure and stoichiometry [1]. While annealing in ultra high vacuum and the adsorption of small molecules (partially) lift the subsurface cation vacancy reconstruction on Fe$_3$O$_4$ (001) surfaces [3,4,5], annealing under oxidising conditions results in the growth of new Fe$_3$O$_4$ layers involving...
Misfit strain in crystalline core-shell nanowires can be elastically released by nanowire curvature in case of inhomogeneous shell growth around the nanowires 1. In this work, we performed time-resolved in-situ XRD investigations of the evolution of GaAs nanowires bending during the asymmetric growth of InxGa1-xAs shell without substrate rotation. By means of micro X-ray beam at beamline P23...
Platinum electrocatalyst degradation forms a large barrier for the wide-spread application of electrolysers and fuel cells, which are crucial for a sustainable energy society. A detailed understanding of the catalyst surface structure during the chemical reaction is required to design more stable catalysts. We have developed a Rotating Disk Electrode (RDE) setup that enables a structural...
