Atomic-Scale Investigations of Catalytic Nanostructures Ex Situ/In Situ with an Aberration-Corrected STEM

Atomic-Scale Investigations of Catalytic Nanostructures Ex Situ/In Situ with an Aberration-Corrected STEM

Presenter

  • Sagar Prabhudev, McMaster University, Toronto, Canada
January 14, 2019 - 10:00am to 11:00am

Abstract 

Scanning transmission electron microscopy (STEM) has always played an important role in the development of new materials. Particularly in the case of catalysis, where an atomic-level understanding of catalyst structures is central to the development of future energy conversion devices such as fuel cells, STEM provides an exhaustive tool kit for a reliable estimation of their bulk/surface-structures, morphological evolution, and bonding analyses in the form of series of imaging (HAADF, ADF, BF, ABF) and spectroscopic techniques (low-loss/core-loss EELS). The speaker will present recent examples in the study of Pt-based (and several other) nano-alloy catalysts, highlighting the use of ex situ/in situ STEM-based methods in probing the interplay between surface segregation and atomic ordering. The speaker will highlight recent advancements in the area of low-dose imaging (e.g., 4D-STEM) in view of their potential applications to catalysis.

Sponsoring Organization 

Center for Nanophase Materials Sciences

Location

  • High Temperature Materials Laboratory
  • Building: 4515
  • Room: 265

Contact Information

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