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Scientific Highlights from Research Division Energy and Environment (ENE)

Scientific Highlights

28. Januar 2021
Reaction route study

XPS allows in situ investigation of the solid-gas interface during a catalytic reaction

Platinum isolated atoms and clusters supported on molybdenum carbide have been characterized in situ by means of photoelectron spectroscopy. The presence of both species is essential to favor the stability, so that the catalysts displays high metal-normalized turnover number of 4,300,000 moles of hydrogen per mole of platinum during the water gas shift reaction.

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2. November 2020
Size of the corona virus: 60 - 140 nm

Aerosol distribution in rooms and the importance of proper ventilation

Urs Baltensperger explains the background why it is absolutely necessary to wear masks in order to reduce the risk of beeing infected with Covid-19.

In the following you find the presentation and  summary

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21. Juli 2020
PSI Summer Camp

Einfache Experimente zeigen: so gut schützen uns Masken und andere Materialien

Spätestens seit Corona ist der Maskengebrauch auch in der Schweiz im Alltag präsent. Doch wie gut können wir uns und andere mit verschieden Materialien vor kleineren und grösseren Partikeln schützen? Das alljährlich durchgeführte PSI Feriencamp bietet Kindern einen spannenden Einblick in die faszinierende Welt der Forschung. In diesem Jahr gingen Kinder an einer Projektstation genau dieser Frage nach. Dabei untersuchten sie, wie gut verschiedene Materialien die im Labor generierten Partikel zurückhalten. Es wurden Textilmasken (im Handel erhältlich, wiederverwendbar, nicht FFP2-zertifiziert), Chirurgenmasken (Einwegmasken, FFP2-zertifiziert), Teefilter, Kaffeefilter, Papiertaschentuch und WC-Papier getestet, und es wurde klar, Maske ist nicht gleich Maske.

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26. Juni 2020
Online Orbitrap mass spectrometer for unambiguous molecular detections in real time and with high sensitivity

Online ultrahigh resolution mass spectrometry for the molecular analysis of the atmosphere

Atmospheric aerosols are considered the single largest uncertainty in assessing the human contribution to global warming and amongst the top five health risks worldwide. Our ability to investigate aerosol sources, their formation processes in the gas-phase, and their societal impacts is largely governed by our capability to measure their molecular constituents in real-time. Researchers at PSI have combined for the first time ultrahigh resolution mass spectrometry with high time resolution and sensitivity for the molecular analysis of aerosols.

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18. Mai 2020
Artwork illustrating inhomogeneities in a megacity

Newly discovered rapid particle growth rates may be the answer to the mystery of aerosol formation in urban smog

Aerosols, suspended particles or droplets, play a key role in Earth’s atmosphere’s energy balance. They can also result in smog formation in cities, which leads to low visibility and serious health risks for the population. A recent study published in Nature outlines a newly discovered mechanism that may play a key role in the continued survival of particles in wintertime smog.

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8. Mai 2020
Andrea Baccarini and Julia Schmale in the atmospheric measurement container during ACE

Around Antarctica in 90 days to study the pristine atmosphere

PSI researchers have designed and equipped a laboratory container for operation on research ships to undertake comprehensive studies of the chemistry and microphysics of the atmosphere. The floating laboratory was first deployed during the Antarctic Circumnavigation Expedition (ACE) with the aim of characterizing aerosol processes that are relevant for climate change in an atmosphere, which is hardly influenced by human emissions of air pollutants other than greenhouse gases.

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3. Februar 2020
Operando XTM results of modified fuel cell microporous layer.

Fast operando X-ray tomographic microscopy improves polymer electrolyte fuel cells

Polymer electrolyte fuel cells (PEFC) are a key technology for the decarbonization of automotive mobility. In collaboration with Toyota, it is shown by dynamic, operando X-ray tomographic microscopy, how the liquid water saturation in modified gas diffusion layer materials is reduced.

The imaging data supports the understanding of the underlying mechanisms and explains improved cell performance. Novel instrumentation at the TOMCAT beamline  further improves imaging time resolution and allows for scan times as short as 0.1 s.

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15. Januar 2020
3D Support

A third dimension for the nanoscale

Researchers of the Laboratory for Catalysis and Sustainable Chemistry (LSK) from PSI have designed uneven probe supports, which reveal the hidden site of nanocrystals.

Their simple approach allows transmission electron microscopes (TEMs) complete access to the atomic structure of nanomaterials without the need for cumbersome experimental effort.

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14. Oktober 2019
In Situ Liquid SAXS Studies on the Early Stage of Calcium Carbonate Formation

Matter before solid nucleation under synchrotron light

Investigation on early stage of solid formation from solution, before nucleation, have been carried out at PSI by small angle scattering technique using X-ray light from the Swiss Light Source SLS. The system under analysis was calcium carbonate, a model system archetype of several sparsely soluble inorganic materials and relevant in many field such as CO2 capturing and biomineralization. The experimental setup, the method, and developed theoretical framework can be applied to many other systems and made available for the entire scientific community.

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PSI Scientific Reports

Archive 2006-2012. The Scientific Reports – containing accounts of research topics from all the different areas – provide an impression of the variety of subjects researched at PSI.

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