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Abstract <p>The use of IR spectrometry and X-ray diffractometry for evaluating the crystallinity of the active components of hydrogenation catalysts deposited on alumina in the α- and γ-Al<sub>2</sub>O<sub>3</sub> modifications is considered. The possibility of using IR spectroscopy in a comprehensive approach to qualitative and quantitative evaluation of the crystallinity of CuO and NiO in the catalysts is substantiated. Copper and nickel catalysts supported on α- and γ-Al<sub>2</sub>O<sub>3</sub> were synthesized and tested. The crystallinity was evaluated using the characteristic absorption bands in the IR spectra: 1480 and 450 cm<sup>–1</sup> bands for NiO and 1320 and 422 cm<sup>–1</sup> for CuO. The experimental data showed that the crystallinity of the active phase has a significant effect on the catalytic activity in the hydrogenation reaction. The structure of the substrate (α- or γ-Al<sub>2</sub>O<sub>3</sub>) affects the distribution and state of metal phases, which also affects the activity of the catalysts.</p>

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Using IR Spectrometry and X-ray Diffractometry to Determine the Crystallinity of Supported Hydrogenation Catalysts

  • 期刊论文

  • 发表日期：

    2025年10月16日

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  • E. P. Smirnov,
  • E. A. Pokrovskaya,
  • D. A. Prozorov,
  • A. V. Afineevskii,
  • D. V. Smirnov,
  • D. S. Shakhov

摘要

Abstract

The use of IR spectrometry and X-ray diffractometry for evaluating the crystallinity of the active components of hydrogenation catalysts deposited on alumina in the α- and γ-Al2O3 modifications is considered. The possibility of using IR spectroscopy in a comprehensive approach to qualitative and quantitative evaluation of the crystallinity of CuO and NiO in the catalysts is substantiated. Copper and nickel catalysts supported on α- and γ-Al2O3 were synthesized and tested. The crystallinity was evaluated using the characteristic absorption bands in the IR spectra: 1480 and 450 cm–1 bands for NiO and 1320 and 422 cm–1 for CuO. The experimental data showed that the crystallinity of the active phase has a significant effect on the catalytic activity in the hydrogenation reaction. The structure of the substrate (α- or γ-Al2O3) affects the distribution and state of metal phases, which also affects the activity of the catalysts.