The use of infrared (IR) spectrometry and X-ray diffractometry for evaluating the crystallinity of active components in hydrogenation catalysts deposited on aluminum oxide supports (α- and γ-AlO) was investigated. The study demonstrates the feasibility of applying IR spectroscopy as a comprehensive method for qualitative and quantitative assessment of the crystallinity of CuO and NiO in catalysts. Catalysts based on copper and nickel deposited on α- and γ-AlO were synthesized and tested. Crystallinity was assessed using characteristic absorption bands in the IR spectra: for NiO – the ratio of bands at 1480 and 450 cm¯1, for CuO – 1320 and 422 cm. Experimental data indicated that the crystallinity of the active phase significantly affects catalytic activity in hydrogenation reactions. The substrate structure (α- or γ-AlO) influences the distribution and state of the metallic phases, which also impacts catalyst activity.
E. P. Smirnov (Wed,) studied this question.