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SUMMARY:Colloidal nanocrystals to advance catalysis and energy technologie
 s - Prof. Raffaella Buonsanti\, École Polytechnique Fédérale de Lausann
 e 
DTSTART:20230620T130000Z
DTEND:20230620T140000Z
UID:TALK200983@talks.cam.ac.uk
CONTACT:Sharon Connor
DESCRIPTION:Affordable clean energy and climate action are two of the sust
 ainable development goals set by the United Nations to be achieved by 2030
 . The vast majority of energy technologies relies on nanomaterials and the
 ir progress is strongly connected to the ability of material chemists to t
 une their property and function-dictating features (i.e. size\, compositio
 n\, composition\, morphology).\nIn this talk\, I will present our recent g
 roup efforts towards the synthesis via colloidal chemistry of atomically d
 efined nanocrystals (NCs) with properties of interest for catalysis and en
 ergy conversion.\nThe first part will focus on our studies on the synthesi
 s development and formation mechanism of Cu NCs. I will illustrate how the
 se NCs with precisely tunable shapes\, sizes and interfaces serve as ideal
  platforms to advance our current knowledge towards improved selectivity i
 n the electrochemical CO2 reduction reaction. I will then share our result
 s evidencing that these NCs can sustain their catalytic activity and selec
 tivity at technologically relevant conditions\, therefore might also offer
  practical solutions.\nThe second part will be dedicated to our colloidal 
 atomic layer deposition (c-ALD) method to grow hybrid materials including 
 NCs surrounded by an oxide shell embedding organic ligands. The oxide shel
 ls confer the NC with improved stability and enable further functionalizat
 ion and post-processing. I will discuss the formation mechanism of the she
 ll by sharing our insight into the surface chemistry. I will then present 
 how we manipulated the growth process in order to incorporate photoactive 
 ligands around semiconductor NCs to create funnel structures with potentia
 l applications as photocatalysts and sensitizers for incoherent photon con
 version.  \n
LOCATION:Dept of Chemistry\, Wolfson Lecture Theatre 
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