The analysis of the interaction metal-support in Ni catalysts by extended X-ray absorption fine structure and X-ray diffraction using synchrotron radiation Article

Aldea, N, Barz, B, Gluhoi, AC et al. (2004). The analysis of the interaction metal-support in Ni catalysts by extended X-ray absorption fine structure and X-ray diffraction using synchrotron radiation . 6(4), 1287-1296.



cited authors

  • Aldea, N; Barz, B; Gluhoi, AC; Marginean, P; Yaning, X; Tiandou, H; Tao, L; Wu, Z; Wu, Z

fiu authors

abstract

  • The supported Ni catalysts were analyzed by extended X-ray absorption fine structure and X-ray diffraction, in order to determine their local and global structure. The present study has pointed out a strong deformation of the local structure of the metal, due to its interaction with oxide support. The average particle size, the mean squares of the microstrain, the probability of the faults, the particle size distribution and microstrain functions of the supported Ni catalysts were determined by X-ray diffraction method. The method is based on Fourier analysis of the experimental X-ray line profiles (111), (200) and (220). The global structure is obtained with a fitting method based on generalized Fermi function facilities for approximation. The local and global microstructures of the catalysts are modified by the strong interaction between the metal clusters and oxide supports. As a result the chemisorption and catalytic processes which occur at the Ni-support interface are also changed.

publication date

  • January 1, 2004

start page

  • 1287

end page

  • 1296

volume

  • 6

issue

  • 4