Document Type
Article
Date
2-25-1986
Keywords
ALUMINA- X-Ray Analysis; MATHEMATICAL TRANSFORMATIONS - Fourier Transforms; SILICA - X-Ray Analysis; X-RAYS - Scattering; SMALL-ANGLE X-RAY SCATTERING; VORONOI CELL MODELS
Disciplines
Chemistry
Description/Abstract
Small-angle X-ray scattering (SAXS) can be used to obtain interphase surface areas of a system, such as a supported-metal catalyst, composed of internally homogeneous phases with sharp interphase boundaries. Measurements of SAXS for samples of porous silica, alumina, platinum on silica, and platinum on alumina are reported. A variety of models and forms for the correlation function, the Fourier transform of which gives the X-ray scattering, are considered, and theoretical and measured intensities are compared. A criterion of fit for comparing models with different numbers of parameters is proposed. It is shown that values for the single interphase surface area can be obtained independently of a model. However, fitting intensities using a model-based correlation function gives information about the structure of the system. The two-cell-size Voronoi and the correlated Voronoi cell models are useful in this regard.
Recommended Citation
Brumberger, H., Delaglio, F., Goodisman, J., & Whitfield, M. (1986). SMALL-ANGLE X-RAY SCATTERING ANALYSIS OF CATALYSTS: COMPARISON AND EVALUATION OF MODELS. Journal of Applied Crystallography, 19(pt 5), 287-299.
Source
local input
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.
Additional Information
Copyright 1986 Journal of Applied Crystallography. This article may be downloaded for personal use only. Any other use requires prior permission of the author and Journal of Applied Crystallography.
The article may be found at http://journals.iucr.org/j/issues/1986/05/00/a26378/a26378.pdf