Understanding catalyst behavior during in situ heating through simultaneous secondary and transmitted electron imaging
Abstract
In situ heating study via a simultaneous secondary electron (SE) and transmitted electron (TE) microscopy is extremely insightful because information from the surface (SE) and bulk (TE) can be readily obtained. The leached Au/Fe2O3 catalyst has voids on the surface of Fe2O3. Upon heating to 500 °C, voids shrank and disappeared, while internal Au species diffused to the surface to form new nanoparticles. Heating in vacuum reduced Fe2O3 to Fe3O4. Heating at 700 °C caused coalescence and growth of Au particles and formation of faceted Fe3O4 surfaces. We achieved 1.1 nm resolution in SE imaging during in situ heating.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Hitachi High-Technologies Canada Inc., Toronto, ON (Canada)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- McGill Univ., Montreal, QC (Canada)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1235811
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nanoscale Research Letters (Online)
- Additional Journal Information:
- Journal Name: Nanoscale Research Letters (Online); Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 1556-276X
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; in situ TEM; STEM; SEM; catalyst; scanning transmission electron microscopy; scanning electron microscopy; phase transformation; In situ characterization
Citation Formats
Howe, Jane Y., Allard, Jr., Lawrence Frederick, Demers, Hendrix, Bigelow, Wilbur C., and Steven H. Overbury. Understanding catalyst behavior during in situ heating through simultaneous secondary and transmitted electron imaging. United States: N. p., 2014.
Web. doi:10.1186/1556-276X-9-614.
Howe, Jane Y., Allard, Jr., Lawrence Frederick, Demers, Hendrix, Bigelow, Wilbur C., & Steven H. Overbury. Understanding catalyst behavior during in situ heating through simultaneous secondary and transmitted electron imaging. United States. https://doi.org/10.1186/1556-276X-9-614
Howe, Jane Y., Allard, Jr., Lawrence Frederick, Demers, Hendrix, Bigelow, Wilbur C., and Steven H. Overbury. Fri .
"Understanding catalyst behavior during in situ heating through simultaneous secondary and transmitted electron imaging". United States. https://doi.org/10.1186/1556-276X-9-614. https://www.osti.gov/servlets/purl/1235811.
@article{osti_1235811,
title = {Understanding catalyst behavior during in situ heating through simultaneous secondary and transmitted electron imaging},
author = {Howe, Jane Y. and Allard, Jr., Lawrence Frederick and Demers, Hendrix and Bigelow, Wilbur C. and Steven H. Overbury},
abstractNote = {In situ heating study via a simultaneous secondary electron (SE) and transmitted electron (TE) microscopy is extremely insightful because information from the surface (SE) and bulk (TE) can be readily obtained. The leached Au/Fe2O3 catalyst has voids on the surface of Fe2O3. Upon heating to 500 °C, voids shrank and disappeared, while internal Au species diffused to the surface to form new nanoparticles. Heating in vacuum reduced Fe2O3 to Fe3O4. Heating at 700 °C caused coalescence and growth of Au particles and formation of faceted Fe3O4 surfaces. We achieved 1.1 nm resolution in SE imaging during in situ heating.},
doi = {10.1186/1556-276X-9-614},
journal = {Nanoscale Research Letters (Online)},
number = 1,
volume = 9,
place = {United States},
year = {Fri Nov 14 00:00:00 EST 2014},
month = {Fri Nov 14 00:00:00 EST 2014}
}
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