KlarText Prize for Hanna Trzesniowski
Dr Hanna Trzesniowski was honoured with the KlarText Prize for Science Communication © Annette Mueck/Klaus Tschira Stiftung
The chemist has been awarded the prestigious KlarText Prize for Science Communication by the Klaus Tschira Foundation.
Hanna is an alumna of Technische Universität Berlin and the Helmholtz-Zentrum-Berlin. She impressed the jury with her article ‘Small windows, big insights’ and made her research into sustainable hydrogen production understandable to a wide audience.
Every year, the KlarText Prize honours young researchers who present their excellent doctoral thesis to a non-scientific audience in the form of a generally understandable article or a vivid infographic. In 2025, around 200 doctoral candidates from the fields of biology, chemistry, geosciences, computer science, mathematics, neuroscience and physics applied for the award. A total of eight scientists were honoured. The award is endowed with 7,500 euros each.
The award ceremony will take place on 13 November 2025 in Heidelberg. From this date, the award-winning articles will be available in the knowledge magazine ‘KlarText’.
Development of new catalysts
Scientists use so-called operando spectroscopy methods to observe materials directly during their work - as if they were curiously looking through a small window. In her dissertation entitled ‘Operando X-ray absorption spectroscopy studies of Ni-based oxygen evolution catalysts in alkaline media’, Dr Hanna Trzesniowski investigated nickel-iron catalysts for water splitting, a key process for sustainable hydrogen production. Using X-rays at the synchrotron source BESSY II, she was able to show that sodium ions penetrate the catalyst layers and stabilise their structure. As a result, the catalysts work more efficiently. Her findings will help to develop new catalysts that can produce hydrogen even more efficiently and cost-effectively.
Hanna Trzesniowski, born in Graz in 1994, studied chemistry at the University of Vienna and moved to TU Berlin for her doctorate in 2020. She was supervised by Prof. Dr Peter Strasser at the Department of Electrocatalysis / Materials at TU Berlin and the Helmholtz-Zentrum Berlin (HZB). Hanna Trzesniowski completed her dissertation in 2024. She currently lives and works in the USA.
- Two winning entries from the HZB in the Helmholtz Imaging ContestA time resolved X-ray tomography by Paul H. Kamm, HZB, has won the second Jury prize and is the winner of the Helmholtz Imaging conference Partizipants Choice Award in this year’s competition. It shows a 3D snapshot of a laser welding process. Among the 20 most beautiful images is also a microscopy image of a solar cell by Yannic Kerkhoff and Daniel Abou Ras, HZB.
- Israel Ibukun Olaniyan receives the Helmholtz Doctoral Prize 2026At Helmholtz, more than 8,000 doctoral candidates conduct research. Eleven of them have now been honored for their original and outstanding work, among them Dr Israel Ibukun Olaniyan from the HZB. His doctoral thesis "Ferroelectricity at the nanoscale in epitaxial BaTiO3 on silicon" in the group of Professor Catherine Dubourdieu represents a step towards a new nanoelectronics based on topological defects, that can potentially help to create an energy efficient information technology.
- Ultrafast demagnetisation - Thinner iron, stronger effectThe thinner an iron film, the more easily it can be demagnetised by a laser pulse. Researchers at the University of Duisburg-Essen, working with Helmholtz-Zentrum Berlin and other partners, have discovered why: the key lies in the magnetic order at the material's interfaces. In the long term, these findings could contribute to the development of new technologies for magnetic data storage. The results have been published in the scientific journal Advanced Science.