TY - GEN
T1 - ATOMIC NUMBER IMAGING OF SUPPORTED CATALYST PARTICLES BY SCANNING TRANSMISSION ELECTRON MICROSCOPE.
AU - Treacy, M. M.J.
PY - 1984
Y1 - 1984
N2 - The capabilities of the conventional and scanning transmission electron microscopes (CTEM and STEM, respectively) as tools for studying supported catalysts are briefly compared. The advantages of Z contrast, or the atomic number imaging technique, in the STEM over conventional imaging technique employed in the CTEM are emphasized. It is shown that Z contrast is capable of detecting small clusters of heavy atoms such as Pt down to single atoms in size when supported on low atomic number supports such as charcoal or gamma -Al//2O//3. The technique, however, is not reliable as a method for unambiguously identifying the chemical nature of such small clusters.
AB - The capabilities of the conventional and scanning transmission electron microscopes (CTEM and STEM, respectively) as tools for studying supported catalysts are briefly compared. The advantages of Z contrast, or the atomic number imaging technique, in the STEM over conventional imaging technique employed in the CTEM are emphasized. It is shown that Z contrast is capable of detecting small clusters of heavy atoms such as Pt down to single atoms in size when supported on low atomic number supports such as charcoal or gamma -Al//2O//3. The technique, however, is not reliable as a method for unambiguously identifying the chemical nature of such small clusters.
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U2 - 10.1021/bk-1984-0248.ch018
DO - 10.1021/bk-1984-0248.ch018
M3 - Conference contribution
AN - SCOPUS:0021577430
SN - 084120831X
SN - 9780841208315
T3 - ACS Symposium Series
SP - 367
EP - 383
BT - ACS Symposium Series
PB - ACS
ER -