The nanostructure of the heterogeneous Ziegler-Natta catalyst was clarified on the basis of cutting-edge analytical techniques.
Scientists from Japan Advanced Institute of Science and Technology (JAIST) and University of Torino (UNITO) have cooperatively clarified the nanostructure of the heterogeneous Ziegler-Natta catalyst by means of combined synchrotron X-ray analytical techniques, vibrational spectrocopies, and molecular simulations.
The nanostructure of the heterogeneous Ziegler-Natta catalyst was clarified on the basis of cutting-edge analytical techniques. Left: Typical synchrotron data and the determined nanoparticle model of the catalyst primary particle. Right: Experimental Far-IR spectra of a series of catalyst supports, and Wulff's polyhedra derived on the basis of surface formation energy.
Understanding the structure and the working principle of practical catalysts is largely beneficial for designing catalysts towards desired performances.
However, this is often infeasible due to inherent complexity of such catalysts. The Ziegler-Natta catalyst is one of the most sophisticated practical catalysts for its performance in producing desired polyolefins at extremely high yield.
Nonetheless, the structure of the nanosized building unit of this catalyst has not been fully understood over six decades.
The collaborative research teams of Japan and Italy quantitatively determined the structural disorder and the dimensions of the building unit based on synchrotron X-ray total scattering analysis aided with molecular simulations.
Further, by combining infrared spectroscopies with state-of-the-art DFT simulations, the morphology and the surface exposure of the building unit were clarified.
The current research corresponds to the first attempt of adopting synchrotron X-ray total scattering and Far IR spectroscopy for the study of the Ziegler-Natta catalyst. Such the multi-faced approach successfully shed new light on the full elucidation of the nanostructure in practical heterogeneous catalysts.
Papers titled "Revisiting the identity of δ-MgCl2: Part I. Structural disorder studied by synchrotron X-ray total scattering", and "Revisiting the identity of δ-MgCl2: Part II. Morphology and exposed surfaces studied by vibrational spectroscopies and DFT calculation", both published in Journal of Catalysis, DOI: https:/
This research forms part of the research programme of DPI (P.O. Box 902, 5600 AX Eindhoven, the Netherlands), project #802.
Toru Wada | EurekAlert!
FAST detects neutral hydrogen emission from extragalactic galaxies for the first time
02.07.2020 | Chinese Academy of Sciences Headquarters
First exposed planetary core discovered
01.07.2020 | Universität Bern
Solar cells based on perovskite compounds could soon make electricity generation from sunlight even more efficient and cheaper. The laboratory efficiency of these perovskite solar cells already exceeds that of the well-known silicon solar cells. An international team led by Stefan Weber from the Max Planck Institute for Polymer Research (MPI-P) in Mainz has found microscopic structures in perovskite crystals that can guide the charge transport in the solar cell. Clever alignment of these "electron highways" could make perovskite solar cells even more powerful.
Solar cells convert sunlight into electricity. During this process, the electrons of the material inside the cell absorb the energy of the light....
Empa researchers have succeeded in applying aerogels to microelectronics: Aerogels based on cellulose nanofibers can effectively shield electromagnetic radiation over a wide frequency range – and they are unrivalled in terms of weight.
Electric motors and electronic devices generate electromagnetic fields that sometimes have to be shielded in order not to affect neighboring electronic...
A promising operating mode for the plasma of a future power plant has been developed at the ASDEX Upgrade fusion device at Max Planck Institute for Plasma...
Live event – July 1, 2020 - 11:00 to 11:45 (CET)
"Automation in Aerospace Industry @ Fraunhofer IFAM"
The Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM l Stade is presenting its forward-looking R&D portfolio for the first time at...
With an X-ray experiment at the European Synchrotron ESRF in Grenoble (France), Empa researchers were able to demonstrate how well their real-time acoustic monitoring of laser weld seams works. With almost 90 percent reliability, they detected the formation of unwanted pores that impair the quality of weld seams. Thanks to a special evaluation method based on artificial intelligence (AI), the detection process is completed in just 70 milliseconds.
Laser welding is a process suitable for joining metals and thermoplastics. It has become particularly well established in highly automated production, for...
02.07.2020 | Event News
19.05.2020 | Event News
07.04.2020 | Event News
03.07.2020 | Life Sciences
03.07.2020 | Earth Sciences
03.07.2020 | Life Sciences