Suchen Suchbegriff RelevanzDatum Sortieren nach Sub-Web Electrochemistry Laboratory (76) News & Events (69) PSI Center for Energy and Environmental Sciences (38) Laboratory of Environmental Chemistry (18) Technology Assessment (14) Research (11) Thin Films and Interfaces (11) Laboratory for Particle Physics (9) Über das PSI (9) Laboratory of Radiochemistry (8) PSI Center for Neutron and Muon Sciences (8) In-situ X-ray Spectroscopy (7) Laboratory for Neutron Scattering and Imaging (7) Laboratory for X-ray Nanoscience and Technologies (7) Laboratory for Muon Spin Spectroscopy (6) Laboratory for Nanoscale Biology (6) Energy Economics (5) Laboratory for Condensed Matter (5) Laboratory for Nano and Quantum Technologies (5) Laboratory of Atmospheric Chemistry (5) Secondary Beam Lines (SBL) (5) BL: SINQ/HRPT (4) Laboratory for Waste Management (4) BL: SINQ/AMOR (3) BL: SLS/Super_XAS (3) Laboratory for Femtochemistry (3) Laboratory of Biomolecular Research (3) Muon Physics (3) PSI Center for Accelerator Science and Engineering (3) SINQ – Swiss Spallation Neutron Source (3) SLS – Swiss Light Source (3) BL: SLS/CSAXS (2) BL: SLS/Phoenix (2) Chancengleichheit (2) Experimental Reactor Physics (2) Group PHOENIX (2) Insertion Devices Group (2) Laboratory for Advanced Spectroscopy and X-ray Sources (2) Laboratory for Energy Systems Analysis (2) Laboratory for Multiscale Materials Experiments (2) Laboratory for Neutron and Muon Instrumentation (2) Laboratory for Sustainable Energy Carriers & Processes (2) Low-Energy Muons (2) PSI Center for Life Sciences (2) PSI Center for Nuclear Engineering and Sciences (2) SLS 2.0 (2) SwissFEL Biolab (2) X-Ray Tomography Group (2) Abteilung Strahlenschutz und Sicherheit (1) Applied Catalysis and Spectroscopy (1) BL: SINQ/CAMEA (1) BL: SINQ/DMC (1) BL: SINQ/NEUTRA (1) BL: SINQ/TASP (1) BL: SLS/ADRESS (1) BL: SLS/Micro_XAS (1) BL: SLS/MS (1) BL: SLS/PEARL (1) BL: SLS/PXII (1) BL: SLS/PXIII (1) BL: SLS/TOMCAT (1) BL: SLS/XIL (1) Bulk µSR Group (1) Electronics for Measuring Systems (1) Electron Microscopy Facility (1) Group MicroXAS (1) High Energy Physics (1) Laboratory for Catalysis and Sustainable Chemistry (1) Laboratory for Macromolecules and Bioimaging (1) Laboratory for Non-linear Optics (1) Laboratory for Reactor Physics and Thermal-Hydraulics (1) Laboratory for Simulation and Modelling (1) Macromolecular Crystallography (1) nEDM Project (1) Neutron Diffraction (1) Neutron Imaging and Applied Materials (1) Neutron Spectroscopy (1) Project FAST (1) Project STARS (1) PSI-FELLOW (1) PSI Center for Photon Science (1) Solid State Chemistry (1) Spectroscopy of Quantum Materials Group (1) Strategic Areas ETH Domain (1) SμS – Swiss Muon Source (1) Tags Energiewende (30) Erneuerbare Energien (24) ESI-Plattform (15) SwissFEL (12) Energiesysteme (9) Industry Relations (9) Mobilität (9) Materialforschung (3) PSI-Campus (3) SINQ (3) SLS (3) Umwelt (3) Verschiedenes (3) Typ Dokument (207) Seite (129) PSI Stories (33) Scientific Highlights (32) Medienmitteilungen (30) Event (17) People page (8) Industry News (3) Lab News (2) 196 - 210 von 461 wird angezeigt Nebenbeschäftigungen der Direktionsmitglieder per 31.05.2022 CVREFS9.pdf CVREFS9.pdf 01.07.2015 Superior Bifunctional Electrocatalytic Activity of Ba0.5Sr0.5Co0.8Fe0.2O3-δ/ Carbon Composite Electrodes: Insight into the Local Electronic Structure Using XAS it was demonstrated that carbon acts as an activity booster for Ba0.5Sr0.5Co0.8Fe0.2O3 oxygen reduction and evolution electrocatalyst promoting change of cobalt oxidation state. People We are delighted to introduce to you the members of the Committee for Equal Opportunities. Find out more about them here. Vacuum Nanoelectronics We have been studying all-metal field emitter array (FEA) cathode [1-14] as a potential high current and high brilliance electron source for advanced accelerator applications e.g. X-ray free electron lasers such as SwissFEL [15], requiring stringent cathode specs: high current (200 pC in 10 ps), low normalized transverse emittance (0.4 mm-mrad), and compatibility with the high acceleration electric field in the order of 100 MV/m. Publications Insertion devices (ID) 31.01.2024 •Energy and Climate Insights into the superior oxygen evolution reaction activity of CoOx/CeO2 composite electrocatalyst CeO2 significantly enhances the oxygen evolution reaction (OER) activity of CoOx, although the mechanism behind this synergy is still unclear. Here, operando hard X-ray absorption spectroscopy (hXAS) is applied to monitor the Co-K edge and Ce L3 edge in CoOx/CeO2 to shed light on the evolution of Co and Ce oxidation states during OER. In addition, ex situ soft XAS (sXAS) characterizations provide information on the irreversible surface-specific transformations of the Co L3 edge as well as the O K edge. 24.08.2023 •Energy and Climate Improving the oxygen evolution reaction activity of Co-based oxides by phosphate functionalization Our findings disclose that P-functionalization successfully enhances the oxygen evolution reaction (OER) activity of different cobalt-based catalysts (namely, La0.2Sr0.8CoO3–δ, La0.2Sr0.8Co0.8Fe0.2O3–δ, and CoOx) at near-neutral pHs and that both phosphate ion assistance in the OER mechanism and catalyst Co oxidation state can play a role in the enhanced OER activity. 28.04.2023 •Energy and Climate The evolution of O2 on Ir-based catalysts requires the complete oxidation of their surface to Ir+5 The evolution of O2 occurring in polymer electrolyte water electrolyzer anodes is a very slow reaction that must be catalyzed using iridium (Ir-) based materials. However, Ir is an extremely scarce metal, and thus the extended commercialization of these electrolyzers will only be possible if the amount of Ir implemented in their anodes is drastically reduced. This requires an improved understanding of the individual steps through which these Ir-based materials catalyze the evolution of O2. 14.01.2022 •Energy and Climate Direct evidence of in situ Co-oxyhydroxide formation on the surface of La0.2Sr0.8CoO3-δ water splitting catalyst We carried out in situ and ex situ ambient pressure X-ray photoelectron spectroscopy (APXPS) experiments on a La0.2Sr0.8CoO3-δ perovskite oxygen evolution reaction (OER) catalyst. The study shows that Sr is leached into the electrolyte after immersion, leading to surface Co active site enrichment. Such a Co-enriched surface evolves into a new phase during operation. With the help of theoretical simulations, such a species is assigned to Co-oxyhydroxide, providing direct evidence of its formation during the OER. LNS Publications Publications NEUTRA: NEUtron Transmission RAdiography 14.01.2019 Fe-Based O2-Reduction Catalysts Synthesized Using Na2CO3 as a Pore-Inducing Agent This work presents a new approach for synthesizing Fe-based oxygen reduction reaction (ORR) catalysts using sodium carbonate (Na2CO3) as an inexpensive but effective pore-inducing agent offering microporosity control. publist2019_0.pdf Erste Seite « Erste Vorherige Seite ‹ Vorherige … 10 11 12 13 14 15 16 17 18 … Nächste Seite Nächste › Letzte Seite Letzte »
01.07.2015 Superior Bifunctional Electrocatalytic Activity of Ba0.5Sr0.5Co0.8Fe0.2O3-δ/ Carbon Composite Electrodes: Insight into the Local Electronic Structure Using XAS it was demonstrated that carbon acts as an activity booster for Ba0.5Sr0.5Co0.8Fe0.2O3 oxygen reduction and evolution electrocatalyst promoting change of cobalt oxidation state.
People We are delighted to introduce to you the members of the Committee for Equal Opportunities. Find out more about them here.
Vacuum Nanoelectronics We have been studying all-metal field emitter array (FEA) cathode [1-14] as a potential high current and high brilliance electron source for advanced accelerator applications e.g. X-ray free electron lasers such as SwissFEL [15], requiring stringent cathode specs: high current (200 pC in 10 ps), low normalized transverse emittance (0.4 mm-mrad), and compatibility with the high acceleration electric field in the order of 100 MV/m.
31.01.2024 •Energy and Climate Insights into the superior oxygen evolution reaction activity of CoOx/CeO2 composite electrocatalyst CeO2 significantly enhances the oxygen evolution reaction (OER) activity of CoOx, although the mechanism behind this synergy is still unclear. Here, operando hard X-ray absorption spectroscopy (hXAS) is applied to monitor the Co-K edge and Ce L3 edge in CoOx/CeO2 to shed light on the evolution of Co and Ce oxidation states during OER. In addition, ex situ soft XAS (sXAS) characterizations provide information on the irreversible surface-specific transformations of the Co L3 edge as well as the O K edge.
24.08.2023 •Energy and Climate Improving the oxygen evolution reaction activity of Co-based oxides by phosphate functionalization Our findings disclose that P-functionalization successfully enhances the oxygen evolution reaction (OER) activity of different cobalt-based catalysts (namely, La0.2Sr0.8CoO3–δ, La0.2Sr0.8Co0.8Fe0.2O3–δ, and CoOx) at near-neutral pHs and that both phosphate ion assistance in the OER mechanism and catalyst Co oxidation state can play a role in the enhanced OER activity.
28.04.2023 •Energy and Climate The evolution of O2 on Ir-based catalysts requires the complete oxidation of their surface to Ir+5 The evolution of O2 occurring in polymer electrolyte water electrolyzer anodes is a very slow reaction that must be catalyzed using iridium (Ir-) based materials. However, Ir is an extremely scarce metal, and thus the extended commercialization of these electrolyzers will only be possible if the amount of Ir implemented in their anodes is drastically reduced. This requires an improved understanding of the individual steps through which these Ir-based materials catalyze the evolution of O2.
14.01.2022 •Energy and Climate Direct evidence of in situ Co-oxyhydroxide formation on the surface of La0.2Sr0.8CoO3-δ water splitting catalyst We carried out in situ and ex situ ambient pressure X-ray photoelectron spectroscopy (APXPS) experiments on a La0.2Sr0.8CoO3-δ perovskite oxygen evolution reaction (OER) catalyst. The study shows that Sr is leached into the electrolyte after immersion, leading to surface Co active site enrichment. Such a Co-enriched surface evolves into a new phase during operation. With the help of theoretical simulations, such a species is assigned to Co-oxyhydroxide, providing direct evidence of its formation during the OER.
14.01.2019 Fe-Based O2-Reduction Catalysts Synthesized Using Na2CO3 as a Pore-Inducing Agent This work presents a new approach for synthesizing Fe-based oxygen reduction reaction (ORR) catalysts using sodium carbonate (Na2CO3) as an inexpensive but effective pore-inducing agent offering microporosity control.