X-Ray Photoelectron Spectroscopy Study of Silica-Alumina Catalysts Used for a 
New Pyridine Synthesis

Bicker, R.; Deger, H.; Herzog, W.; Rieser, K.; Pulm, H.; Hohlneicher, G.; Freund, Hans-Joachim

doi:10.1016/0021-9517(85)90083-1

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X-Ray Photoelectron Spectroscopy Study of Silica-Alumina Catalysts Used for a New Pyridine Synthesis

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Bicker, R., Deger, H., Herzog, W., Rieser, K., Pulm, H., Hohlneicher, G., et al. (1985). X-Ray Photoelectron Spectroscopy Study of Silica-Alumina Catalysts Used for a New Pyridine Synthesis. Journal of Catalysis, 94(1), 69-78. doi:10.1016/0021-9517(85)90083-1.

Cite as: https://hdl.handle.net/21.11116/0000-000E-5885-9

Abstract

Alumina-doped silica gels used as catalysts for a new pyridine synthesis from cyclopentadiene and ammonia have been investigated using X-ray photoelectron spectroscopy. Two different types of aluminum species are identified. Their chemical nature is assigned to a "normal" Al oxide and a more electron-rich Al species (Brønsted centers). The distribution of the two species within the samples as a function of distance from the surface is not homogeneous and is strongly dependent upon the preparation of the catalyst. The concentration of the Brønsted centers in the proximity of the catalyst surface seems to correlate with the activity of the catalyst in the pyridine synthesis.