Abstract
Copper-containing catalysts based on CeO2–ZrO2 solid solutions were prepared by the Pecini method and studied using a set of physicochemical methods. It was found that the bond strength of oxygen on the catalyst surface, which depends on the properties of supported copper oxide clusters and a ratio between CeO2 and ZrO2 in the support, plays a main role in ethanol conversion. Ethoxy groups, acetate and formate complexes, and condensation products were detected as main surface intermediates formed in the course of ethanol conversion on the catalysts. The decomposition of the formate complexes was the key stage in the formation of hydrogen. Its appearance on the surface of the catalysts was due to the competition between the reactions of formate and acetate complex formation for oxygen with suitable properties.
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This work was supported by the Russian Foundation for Basic Research (grant no. 18-03-00627A).
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Translated by V. Makhlyarchuk
Abbreviations and designations: XRD, X-ray diffraction; BET, Brunauer–Emmett–Teller method; TPR, temperature-programmed reduction; EPR, electron paramagnetic resonance; TPD, temperature-programmed desorption; DRES, diffuse reflection electronic spectroscopy; A, optical absorption; CSR, coherent scattering region; Ssp, specific surface area.
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Matyshak, V.A., Sil’chenkova, O.N., Ilichev, A.N. et al. Copper-Containing Catalysts Based on Cerium–Zirconium Oxide Supports in Ethanol Conversion Reaction According to In Situ IR Spectroscopic Data. Kinet Catal 62, 404–417 (2021). https://doi.org/10.1134/S0023158421020087
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DOI: https://doi.org/10.1134/S0023158421020087