The effect of Preparation Method on Metal-Support Interaction in Pd/L-Zeolite Catalysts

G. Larsen; G. L. Haller

doi:10.1016/S0167-2991(08)64018-5

The effect of Preparation Method on Metal-Support Interaction in Pd/L-Zeolite Catalysts

G. Larsen, G. L. Haller

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The method of preparation, ion exchange (IE) versus impregnation (IP), effects the final dispersion, acidity and sintering stability of L-zeolite supported catalysts. The origin of the dispersion effect appears to be in the shape and size of the PdO precursor formed upon calcination which is more elongated with respect to the zeolite channel and has a lower nearest neighbor oxide coordination number when IP is used. While acidity introduced into the L-zeolite before preparation does not appear to effect the initial dispersion, acidity introduced after reduction of the IE preparation stabilizes the Pd particles toward sintering in H₂.

Original language	English (US)
Pages (from-to)	297-309
Number of pages	13
Journal	Studies in Surface Science and Catalysis
Volume	75
Issue number	C
DOIs	https://doi.org/10.1016/S0167-2991(08)64018-5
State	Published - Jan 1 1993
Externally published	Yes

ASJC Scopus subject areas

Catalysis
Condensed Matter Physics
Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/S0167-2991(08)64018-5

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title = "The effect of Preparation Method on Metal-Support Interaction in Pd/L-Zeolite Catalysts",

abstract = "The method of preparation, ion exchange (IE) versus impregnation (IP), effects the final dispersion, acidity and sintering stability of L-zeolite supported catalysts. The origin of the dispersion effect appears to be in the shape and size of the PdO precursor formed upon calcination which is more elongated with respect to the zeolite channel and has a lower nearest neighbor oxide coordination number when IP is used. While acidity introduced into the L-zeolite before preparation does not appear to effect the initial dispersion, acidity introduced after reduction of the IE preparation stabilizes the Pd particles toward sintering in H2.",

author = "G. Larsen and Haller, {G. L.}",

note = "Funding Information: This research was supported by the DOE Office of Basic Energy Sciences. Partial support from Sun Company is also acknowledged. We wish to thank the Cornell High Energy Synchrotron Source for beam time. We also wish to thank Daniel Resasco for measurement of some surface areas.",

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doi = "10.1016/S0167-2991(08)64018-5",

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T1 - The effect of Preparation Method on Metal-Support Interaction in Pd/L-Zeolite Catalysts

AU - Larsen, G.

AU - Haller, G. L.

N1 - Funding Information: This research was supported by the DOE Office of Basic Energy Sciences. Partial support from Sun Company is also acknowledged. We wish to thank the Cornell High Energy Synchrotron Source for beam time. We also wish to thank Daniel Resasco for measurement of some surface areas.

PY - 1993/1/1

Y1 - 1993/1/1

N2 - The method of preparation, ion exchange (IE) versus impregnation (IP), effects the final dispersion, acidity and sintering stability of L-zeolite supported catalysts. The origin of the dispersion effect appears to be in the shape and size of the PdO precursor formed upon calcination which is more elongated with respect to the zeolite channel and has a lower nearest neighbor oxide coordination number when IP is used. While acidity introduced into the L-zeolite before preparation does not appear to effect the initial dispersion, acidity introduced after reduction of the IE preparation stabilizes the Pd particles toward sintering in H2.

AB - The method of preparation, ion exchange (IE) versus impregnation (IP), effects the final dispersion, acidity and sintering stability of L-zeolite supported catalysts. The origin of the dispersion effect appears to be in the shape and size of the PdO precursor formed upon calcination which is more elongated with respect to the zeolite channel and has a lower nearest neighbor oxide coordination number when IP is used. While acidity introduced into the L-zeolite before preparation does not appear to effect the initial dispersion, acidity introduced after reduction of the IE preparation stabilizes the Pd particles toward sintering in H2.

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The effect of Preparation Method on Metal-Support Interaction in Pd/L-Zeolite Catalysts

Abstract

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