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SUMMARY:Chemical Engineering Seminar - Charge and excited state dynamics i
 n 3D and 2D hybrid perovskites.Bridging Molecular and Heterogeneous Electr
 ocatalysis Through Graphite Conjugation.
DTSTART:20181019T161500
DTEND:20181019T171500
DTSTAMP:20260916T055657Z
UID:5257b5274f06961b811d86d0219d5e3ac3b1636254232942a32250fc
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Yogesh Surendarath\, Department of Chemistry\, Massachus
 etts Institute of Technology\, Cambridge\, USA.\nThe efficient interconver
 sion of electrical and chemical energy requires catalysts capable of accel
 erating complex multi-electron reactions at electrified interfaces. These 
 reactions can be carried out at the metallic surface sites of heterogeneou
 s electrocatalysts or via redox mediation at molecular electrocatalysts. M
 olecular catalysts yield readily to synthetic alteration of their redox pr
 operties and secondary coordination sphere\, permitting systematic tuning 
 of their activity and selectivity. Similar control is difficult to achieve
  with heterogeneous electrocatalysts because they typically exhibit a dist
 ribution of active site geometries and local electronic structures\, which
  are recalcitrant to molecular-level synthetic modification. However\, met
 allic heterogeneous electrocatalysts benefit from a continuum of electroni
 c states which distribute the redox burden of a multi-electron transformat
 ion\, enabling more efficient catalysis. We have developed a simple synthe
 tic strategy for conjugating well-defined molecular catalyst active sites 
 with the extended states of graphitic solids. Electrochemical and spectros
 copic data indicate that these graphite-conjugated catalysts do not behave
  like their molecular analogues\, but rather as metallic active sites with
  molecular definition\, providing a unique bridge between the traditionall
 y disparate fields of molecular and heterogeneous electrocatalysis.
LOCATION:BCH 2201 https://plan.epfl.ch/?room==BCH%202201
STATUS:CONFIRMED
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