Aluminium sichtbar gemacht
PSI-Forschende haben in Zeolithen erstmals die genaue Lage der Aluminiumatome bestimmt, welche die Materialien zu so guten Katalysatoren machen.
Water gets in shape for VUV absorption
Nanometre‑thin, free‑flowing liquid sheets now let Swiss Light Source users record pristine VUV absorption spectra of water, and soon any solvent.
Nobel Prize winner Anne L’Huillier visits SwissFEL
X-ray free-electron lasers could unlock the next frontier in attosecond research
Leistungsfähige Lithium-Luft-Batterien alltagstauglich machen
Mit Neutronenstrahlen und Synchrotronlicht die chemischen Prozesse in Lithium-Luft-Batterien enthüllt.
Whitlockite in mammary microcalcifications is not associated with breast cancer
Microcalcifications, small deposits of calcium-containing minerals that form in breast tissue, are often, but not always, a warning sign of breast cancer. The relationship between microcalcifications and cancer has not been fully understood thus far. Researchers discovered now that the relationship between microcalcifications and tumors seems to be linked to the presence of a particular mineral called whitlockite, which is rich in magnesium and is found in microcalcifications only in the absence of tumors.
Unveiling the reaction mechanism shines light on the selectivity increase in catalytic processes
Increasing the selectivity of a chemical process through rational catalyst design is the Holy Grail of heterogeneous catalysis. Researchers at PSI and ETH Zürich showcase how revealing hidden steps in reaction pathways can steer processes towards preferred products, as demonstrated in a study focused on biomass valorization.
Tender X-rays show how one of nature’s strongest bonds breaks
Short flashes of an unusual kind of X-ray light at SwissFEL and SLS bring scientists closer to developing better catalysts to transform the greenhouse gas methane into a less harmful chemical.
Quality control of future transistors: Tackling the challenge of looking at atoms buried in silicon without moving them
Tackling the challenge of looking at atoms buried in silicon without moving them
So entstehen Fussballmoleküle im Weltall
Ein internationales Forscherteam zeigt, wie sich Fullerene im Weltall bilden.
A star is born
Swiss Light Source SLS reveals complex chemistry inside ‘stellar nurseries’
3,1 Millionen Förderung für neue Forschungsprojekte am PSI
Die beiden PSI-Forschenden Zurab Guguchia und Kirsten Schnorr erhalten vom Schweizerischen Nationalfonds Förderbeiträge von insgesamt 3,1 Millionen CHF für zukunftsweisende Projekte.
Tracking chemical bond changes with element selectivity and in real time
X-ray photoelectron spectroscopy probes the chemical environment in a molecule at a specific atomic site. Now the concept is extended with a site selective trigger to follow chemical bond changes as they occur on the femtosecond time scale.
PSI researcher Patrick Hemberger honored in the Rising Stars special issue in Energy & Fuels
To celebrate contributions of highly influential early and mid-career researchers in energy research, the journal Energy & Fuels established an annual recognition of Energy and Fuels Rising Stars.
Finding Ketenes in the Methanol to Olefins Process
How are the first olefins formed in the early stages of the methanol-to-olefins process? Detection of two reactive ketene species solves this long-standing puzzle.
The chemical complex that regulates body zinc storage
Zinc deficiency compromises the immune system and is a global public health problem. Through experiments at the Swiss Light Source SLS and BESSYII, researchers gained new insights into zinc storage, with implications for understanding COVID-19 severity.
Reaction insights help make sustainable liquid fuels
Methanol made from CO2 in the air can be transformed into carbon neutral fuels. New mechanistic understanding aids development of this sustainable alternative.
New SwissFEL soft X-ray endstation welcomes first users
Maloja is go. First user experiments mark a double first, not only for the Maloja endstation but also for the second beamline of SwissFEL, Athos.
Hercules School 2022
PSI hosted again the Hercules School in March 2022. We had the pleasure to welcome 20 international PhD students, PostDocs and scientists to demonstrate our state-of-the-art techniques and methodologies at our large scale facilities, the Swiss Light Source (SLS), the Swiss Spallation Neutron Source (SINQ) and our free electron laser SwissFEL.
Simulation soll bei Aufräumarbeiten in Fukushima helfen
Eine neue Simulation der gefährlichsten radioaktiven Trümmer des Kernkraftwerks Fukushima soll bei Aufräumarbeiten helfen.
Watch them growing: New mechanistic insights into catalytic methane coupling
Methane valorization is a promising technology to utilize this platform compound to produce aromatics and hydrocarbons. Researchers from PSI and ETH Zürich unveiled this reaction mechanism and observed the molecular growth from the ground up. Besides stepwise CH3 addition, novel routes involving the dimerization of resonantly stabilized propargyl (C3H3) radicals to benzene (C6H6) were identified. These mechanistic insights will aid the development of valorisation strategies.
Geheimnis der Stradivari-Geigen enthüllt
Wie ein internationales Team von Forschenden herausfand, griffen die alten italienischen Meister Stradivari und Guarneri beim Geigenbau zu unerwarteten chemischen Hilfsmitteln.
Full-field X-ray absorption tomography reveals the chemical structure of defects in metal-organic frameworks
Cryo-full-field XANES computed tomography was used to visualize the presence and distribution of a second coordination polymer of reduced copper coordination within defect-engineered HKUST-1 MOF crystals. Observations encourage a revisitation of the structure-property relationships of defect-engineered MOFs.
Wie Katalysatoren altern
Katalysatoren, die in der Industrie eingesetzt werden, verändern über die Jahre ihre Materialstruktur. Mit einer neuen Methode haben PSI-Forschende dies nun auf der Nano-Skala untersucht.
Important elementary reactions of lignin catalytic pyrolysis revealed
To develop sustainable lignin valorization strategies, a solid understanding of the underlying reaction mechanism is critical. By detection of highly reactive and elusive intermediates, new light could be shed on one of the most basic elementary reactions in lignin catalytic fast pyrolysis.
HERCULES SCHOOL 2021 AT PSI
During the week of March 15 – 19, we had the pleasure to welcome 20 international PhD students, PostDocs and assistant professors at PSI, taking part in the first virtual HERCULES SCHOOL on Neutrons & Synchrotron Radiation.
Insights into the world’s oldest pile carpet
High-resolution XRF imaging of the specific metal distribution within wool fibers at the PHOENIX beamline gives insights into traditional oriental dyeing procedures.
Clocking the movement of electrons inside an atom
Scientists pioneer an approach called self-referenced streaking, clocking Auger electrons with sub-femtosecond resolution. The breakthrough will unlock the broader potential for attosecond time resolution at X-ray free-electron lasers.
Dreidimensionaler Blick in aktive Katalysatoren
Die operando-Röntgenspektroskopie erlaubt einen Blick ins Innere laufender Chemiereaktoren. Forschende des Karlsruher Instituts für Technologie (KIT), am Paul Scherrer Institut PSI und an der European Synchrotron Radiation Facility (ESRF) in Frankreich setzen die Methode erfolgreich ein.
Key activity descriptors of nickel-iron oxygen evolution electrocatalysts in the presence of alkali metal cations
Ni-Fe oxyhydroxide is among the most active oxygen evolution electrocatalysts. Electrolyte alkali metal cations modify the activity and reaction intermediates, however, the exact mechanism is at question due to unexplained deviations from the cation size trend. Our X-ray absorption spectroelectrochemical results show that the OER activity follows the variations in .electrolyte pH rather than a specific cation. Our DFT-based reactivity descriptors confirm the conclusions of an indirect pH effect.
Ruzicka Prize
The Ružička Prize 2020 goes to Dr. Patrick Hemberger (PSI) for his research on understanding the mechanisms of catalytic fast pyrolysis by unveiling reactive intermediates in heterogeneous catalysts.