Aberration-Corrected STEM Imaging of Ag on γ-Al2O3

Blom, Douglas A.; Allard, Lawrence F.; Narula, Chaitanya K.; Moses-DeBusk, Melanie J.

doi:10.1017/S143192760808015X

Aberration-Corrected STEM Imaging of Ag on γ-Al₂O₃

Journal Article · Fri Dec 21 04:00:00 UTC 2007 · Microscopy and Microanalysis

DOI:https://doi.org/10.1017/S143192760808015X· OSTI ID:1364241

Blom, Douglas A. ^[1]; Allard, Lawrence F. ^[1]; Narula, Chaitanya K. ^[1]; Moses-DeBusk, Melanie J. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division

Ag on γ-alumina is a promising catalyst for hydrocarbon selective catalytic reduction in lean-burn gasoline and diesel engines for transportation applications. There is little agreement exists on the nature of the active silver species, though much is known about the mechanism of NO_x reduction and the various intermediates. Here, aberration-corrected STEM has provided new information about the nature of Ag on alumina both as impregnated and following treatments at various temperatures with exposure to simulated exhaust gas. Ex situ techniques have provided new insights into the evolution of Ag on alumina following exposure to temperature and simulated exhaust gas.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 1364241

Journal Information:: Microscopy and Microanalysis, Journal Name: Microscopy and Microanalysis Journal Issue: 01 Vol. 14; ISSN 1431-9276; ISSN applab

Publisher:: Microscopy Society of America (MSA)

Country of Publication:: United States

Language:: English

References (17)

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