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SUMMARY:Reaction-Driven Formation of Novel Active Sites on Catalytic Surfa
 ces - Professor Manos Mavrikakis\, University of Wisconsin-Madison
DTSTART:20251015T133000Z
DTEND:20251015T143000Z
UID:TALK236599@talks.cam.ac.uk
CONTACT:Lisa Masters
DESCRIPTION:Adsorption of reactants and reaction intermediates on solid ca
 talytic surfaces can lead to significant changes of the surface structure\
 , including\, as shown in high-pressure Scanning Tunneling Microscopy (STM
 ) experiments\, ejection of metal atoms and formation of metal clusters wh
 ile the reaction is taking place. Depending on the specific system\, these
  clusters provide new\, more favorable reaction paths than the typically c
 onsidered active sites. In this talk\, we will attempt to provide a more r
 ealistic picture of the catalyst’s surface and its active sites as a fun
 ction of reaction conditions and the identity of reactants and that of key
  intermediates. Surface structure sensitivity\, alloying\, adsorbate cover
 age\, and nanoparticle size effects will be discussed. These phenomena are
  directly related to nanoparticle sintering and have important consequence
 s for catalyst stability. Insights derived from our analysis can inform th
 e design of new catalysts with improved activity\, selectivity\, and stabi
 lity characteristics.
LOCATION:Dept of Chemistry\, Unilever Lecture Theatre
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