Conclusions
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1.
The reduction of Ni2+ to the Ni(0) state occurs when the Ni forms of zeolite Y are treated in vacuo and in H2 at 350–400°. The reduction proceeds more easily in samples with low degrees of exchange.
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2.
The oxidation of samples, reduced with H2 at temperatures above 400°, leads to the formation of the NiO phase.
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3.
The Ni zeolite catalysts, in which the nickel is reduced to the metallic state, possess activity with respect to the low-temperature homomolecular exchange of oxygen.
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Literature cited
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2131–2133, September, 1973.
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Minachev, K.M., Antoshin, G.V., Shpiro, E.S. et al. X-ray photoelectron spectroscopic study of state of Ni in Ni forms of zeolite Y. Russ Chem Bull 22, 2078–2080 (1973). https://doi.org/10.1007/BF00929412
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DOI: https://doi.org/10.1007/BF00929412