Decomposition of N2O on Cu/ZSM-5 Catalysts Obtained from Copper Complexes of Various Structures
R. A. SHUTILOV, V. YU. GAVRILOV
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: комплексы оксида меди, катализаторы Cu/ZSM-5, разложение N2O, copper oxide complexes, Cu/ZSM-5 catalysts, N2O decomposition
Pages: 86-95
Abstract
The use of copper oxide complexes (CC) of various structures: CC-I (copper tetrammine complex with the ground state of copper ions (dx2 - dy2), characterized by a weak exchange magnetic interaction in the EPR spectra) and CC-III (Cu2+ ions with the ground state (dx2 - dy2), with the strong exchange magnetic interaction) in the synthesis of Cu/ZSM-5 catalysts allowed us to study the effect of their structure on the physicochemical and catalytic properties in the decomposition of nitrogen (I) oxide (N2O). It was demonstrated by means of H2-TPR and IR spectroscopy of adsorbed CO that the nature of the reduction of Cu/ZSM-5 catalysts is determined by the state of copper in the catalyst. It was established that the highest catalytic activity is observed for the catalysts prepared using CC-III. Extraframework CuO-like clusters stabilized on the outer surface of zeolite crystallites prepared using CC-III are the most effective centres for the decomposition of nitrous oxide, and the activity of catalysts increases with an increase in copper content.
DOI: 10.15372/CSD2020207
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