Determination of metal crystallite size and morphology in supported nickel catalysts

Journal Article · Thu Jan 01 04:00:00 EST 1981 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(81)90271-2· OSTI ID:6572974

Mustard, D G; Bartholomew, C H

The application of H/sub 2/ chemisorption, x-ray diffraction (XRD) line broadening, and transmission electron microscopy (TEM) to the determination of metal crystallite size and size distribution in Ni/SiO/sub 2/, Ni/Al/sub 2/O/sub 3/, and Ni/TiO/sub 2/ catalysts having wide ranges of nickel loadings and dispersions was investigated. Average crystallite diameters estimated from H/sub 2/ chemisorption and TEM were found to be in very good agreement over wide ranges of metal dispersion and loading in the Ni/SiO/sub 2/ system and in good agreement for a 15% Ni/Al/sub 2/O/sub 3/; poor agreement was evident in the Ni/TiO/sub 2/ system, the results suggesting that H/sub 2/ adsorption was suppressed. In the few samples where it was possible to obtain information from XRD, the estimates of crystallite diameter were generally in good or fair agreement with those from H/sub 2/ chemisorption or TEM. The specific limitations of these three techniques in determination of nickel crystallite size and their application to the study of sintering and metal support interactions in supported nickel catalysts are presented and discussed.

• Research Organization: Brigham Young Univ., Provo, UT
• OSTI ID: 6572974
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 67:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
HYDROGEN
MECHANICAL STRUCTURES
METALS
MICROSCOPY
MICROSTRUCTURE
MINERALS
NICKEL
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
SCATTERING
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SORPTION
SUPPORTS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X-RAY DIFFRACTION