Studying the surface reaction between NiO and Al2O3viatotal reflection EXAFS (ReflEXAFS)

T. Costanzo, F. Benzi, P. Ghigna, S. Pin, G. Spinolo, F. d’Acapito, Journal of Synchrotron Radiation 21 (2014) 395–400.

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Journal Article | Published | English
Author
Costanzo, TommasoIST Austria; Benzi, Federico; Ghigna, Paolo; Pin, Sonia; Spinolo, Giorgio; d'Acapito, Francesco
Abstract
The reaction between NiO and (0001)- and ([1\bar102])-oriented Al2O3 single crystals has been investigated on model experimental systems by using the ReflEXAFS technique. Depth-sensitive information is obtained by collecting data above and below the critical angle for total reflection. A systematic protocol for data analysis, based on the recently developed CARD code, was implemented, and a detailed description of the reactive systems was obtained. In particular, for ([1\bar102])-oriented Al2O3, the reaction with NiO is almost complete after heating for 6 h at 1273 K, and an almost uniform layer of spinel is found below a mixed (NiO + spinel) layer at the very upmost part of the sample. In the case of the (0001)-oriented Al2O3, for the same temperature and heating time, the reaction shows a lower advancement degree and a residual fraction of at least 30% NiO is detected in the ReflEXAFS spectra.
Publishing Year
Date Published
2014-01-10
Journal Title
Journal of Synchrotron Radiation
Volume
21
Issue
2
Page
395-400
ISSN
IST-REx-ID

Cite this

Costanzo T, Benzi F, Ghigna P, Pin S, Spinolo G, d’Acapito F. Studying the surface reaction between NiO and Al2O3viatotal reflection EXAFS (ReflEXAFS). Journal of Synchrotron Radiation. 2014;21(2):395-400. doi:10.1107/s1600577513031299
Costanzo, T., Benzi, F., Ghigna, P., Pin, S., Spinolo, G., & d’Acapito, F. (2014). Studying the surface reaction between NiO and Al2O3viatotal reflection EXAFS (ReflEXAFS). Journal of Synchrotron Radiation, 21(2), 395–400. https://doi.org/10.1107/s1600577513031299
Costanzo, Tommaso, Federico Benzi, Paolo Ghigna, Sonia Pin, Giorgio Spinolo, and Francesco d’Acapito. “Studying the Surface Reaction between NiO and Al2O3viatotal Reflection EXAFS (ReflEXAFS).” Journal of Synchrotron Radiation 21, no. 2 (2014): 395–400. https://doi.org/10.1107/s1600577513031299.
T. Costanzo, F. Benzi, P. Ghigna, S. Pin, G. Spinolo, and F. d’Acapito, “Studying the surface reaction between NiO and Al2O3viatotal reflection EXAFS (ReflEXAFS),” Journal of Synchrotron Radiation, vol. 21, no. 2, pp. 395–400, 2014.
Costanzo T, Benzi F, Ghigna P, Pin S, Spinolo G, d’Acapito F. 2014. Studying the surface reaction between NiO and Al2O3viatotal reflection EXAFS (ReflEXAFS). Journal of Synchrotron Radiation. 21(2), 395–400.
Costanzo, Tommaso, et al. “Studying the Surface Reaction between NiO and Al2O3viatotal Reflection EXAFS (ReflEXAFS).” Journal of Synchrotron Radiation, vol. 21, no. 2, International Union of Crystallography, 2014, pp. 395–400, doi:10.1107/s1600577513031299.

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