Probing Metal−Support Interactions under Oxidizing and Reducing Conditions:  In Situ Raman and Infrared Spectroscopic and Scanning Transmission Electron Microscopic−X-ray Energy-Dispersive Spectroscopic Investigation of Supported Platinum Catalysts

2008 ◽  
Vol 112 (15) ◽  
pp. 5942-5951 ◽  
Author(s):  
Wenyong Lin ◽  
A. A. Herzing ◽  
C. J. Kiely ◽  
I. E. Wachs
Keyword(s):  
Electron Microscopic ◽  
In Situ Raman ◽  
Supported Platinum ◽  
Reducing Conditions ◽  
Transmission Electron ◽  
Supported Platinum Catalysts ◽  
Scanning Transmission ◽  
Metal Support ◽  
Metal Support Interactions

scholarly journals Dynamic Investigation of Metal-support Interactions in Heterodimer Nanoparticles by in situ Transmission Electron Microscopy

2017 ◽  
Vol 23 (S1) ◽  
pp. 1858-1859
Author(s):  
Volkan Ortalan ◽  
Chang Wan Han ◽  
Jefferey Greeley ◽  
Chao Wang ◽  
Fabio H Ribeiro ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Transmission Electron ◽  
Metal Support ◽  
Metal Support Interactions ◽  
Dynamic Investigation

scholarly journals Vacancy defect control of colossal thermopower in FeSb2

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Qianheng Du ◽  
Lijun Wu ◽  
Huibo Cao ◽  
Chang-Jong Kang ◽  
Christie Nelson ◽  
...  
Keyword(s):  
Phonon Scattering ◽  
Vacancy Defect ◽  
Electron Microscopic ◽  
First Principle Calculation ◽  
Conducting Path ◽  
Transmission Electron ◽  
Vacancy Ordering ◽  
Defect Control ◽  
Scanning Transmission ◽  
Monoclinic Distortion

AbstractIron diantimonide is a material with the highest known thermoelectric power. By combining scanning transmission electron microscopic study with electronic transport neutron, X-ray scattering, and first principle calculation, we identify atomic defects that control colossal thermopower magnitude and nanoprecipitate clusters with Sb vacancy ordering, which induce additional phonon scattering and substantially reduce thermal conductivity. Defects are found to cause rather weak but important monoclinic distortion of the unit cell Pnnm → Pm. The absence of Sb along [010] for high defect concentration forms conducting path due to Fe d orbital overlap. The connection between atomic defect anisotropy and colossal thermopower in FeSb2 paves the way for the understanding and tailoring of giant thermopower in related materials.

Atomic-resolution Studies of Ca3Co4O9 using in-situ Scanning Transmission Electron Microscopy

2008 ◽  
Vol 14 (S2) ◽  
pp. 436-437 ◽  
Author(s):  
G Yang ◽  
Y Zhao ◽  
K Sader ◽  
A Bleloch ◽  
RF Klie
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
New Mexico ◽  
Scanning Transmission Electron Microscopy ◽  
Atomic Resolution ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission

Extended abstract of a paper presented at Microscopy and Microanalysis 2008 in Albuquerque, New Mexico, USA, August 3 – August 7, 2008

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