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SUMMARY:IMX Talks - Revealing the Structural and Chemical Evolution of Ele
 ctrocatalysts using Correlated Operando Electron and X-ray Microscopy
DTSTART:20250228T100000
DTEND:20250228T110000
DTSTAMP:20260921T162428Z
UID:c5389541dce643be9b5f425c61fd9715ef73228d657b9bd708aa9565
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. See Wee Chee\, Fritz Haber Institute of the Max Planck Soc
 iety\, Berlin\, Germany\nElectrocatalysts exist within a complex reaction 
 environment and experience (electro)chemical driving forces that can chang
 e their structure and composition from their as-synthesized state and duri
 ng sustained operation. It is\, therefore\, crucial that we understand how
  the working state of the catalyst evolves under operating conditions if w
 e are to reliably relate catalyst morphologies with their associated catal
 ytic performance. The need to provide such insights and inform the design 
 of catalysts for various green energy applications has driven the widespre
 ad development and adoption of operando techniques\, but there remains a
  crucial gap in our current methods because they largely fall under two ca
 tegories\, broad beam spectroscopy techniques sensitive to the ensemble ch
 emical signatures of the catalytic system or microscopic techniques capabl
 e of high spatial resolution imaging but provide limited information about
  the catalyst’s chemical state. In this talk\, I will discuss my group
 ’s recent work using a combination of transmission electron microscopy a
 nd transmission X-ray microscopy to investigate the structure and chemical
  composition of electrocatalysts under reaction conditions in a spatially 
 and temporally resolved manner. These studies also demonstrate how X-ray s
 pectro-microscopy experiments using the same liquid cells used for liquid 
 phase electron microscopy can provide a vital bridge between local nanosca
 le phenomena and ensemble behaviour.  \n\nBio: See Wee Chee is the group 
 leader for liquid phase electron microscopy in the Department of Interface
  Science at the Fritz Haber Institute (FHI) of the Max Planck Society. He 
 graduated with a B.Appl.Sc. from the Materials Science department in the N
 ational University of Singapore and then\, with a PhD in Materials Science
  and Engineering from the University of Illinois at Urbana-Champaign. His 
 research group in Berlin\, Germany focuses on studying the transformations
  that take place in electrocatalysts under applied potential and in the el
 ectrolyte with liquid phase electron microscopy. Recently\, they have also
  started to conduct operando microscopy experiments at the X-ray synchrotr
 on beamlines.\n 
LOCATION:MXF 312 https://plan.epfl.ch/?room==MXF%20312
STATUS:CONFIRMED
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