Electron Microscopy Studies of Metal Catalysts and Semiconductor Nanocrystals

Electron Microscopy Studies of Metal Catalysts and Semiconductor Nanocrystals

Presenter

  • Li Lu, : Lehigh University, Bethlehem, PA
January 4, 2018 - 10:00am to 11:00am

Abstract 

Materials with nanoscale dimensions often possess unique chemical, electronic, and optical properties that depend on their structure. To develop structure-property correlations and optimize their performance, the structural features of these nanomaterials need to be carefully characterized by aberration-corrected analytical electron microscopy (AC-AEM). This talk will showcase research on electron microscopy studies of metal catalysts and semiconductor nanocrystals, including (1) a comparative study of Ru/ZrO2 and Ru/TiO2 levulinic acid hydrogenation catalysts showing the detrimental role of the strong metal-support interaction that caused the encapsulation of the active Ru species in the latter, (2) systematic characterization of Co particle wetting behaviors over different oxide supports which can be correlated to their catalytic performance in CO2 methanation, (3) identification of isolated cationic gold species as the active sites for acetylene hydrochlorination by a combination of ex-situ AC-AEM and in situ x-ray absorption spectroscopy analysis, and (4) how the functional properties of chalcogenide semiconductor nanocrystals prepared via a novel aqueous-phase biomineralization route have been understood and improved by “microscopy informed nanomaterial design” and how this biomineralization process can be adapted to produce cerium-based oxide materials that can be used as catalysts.

Sponsoring Organization 

Center For Nanophase Materials Sciences

Location

  • High Temperature Materials Laboratory (HTML)
  • Building: 4515
  • Room: 265

Contact Information

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