One-step synthesis of PtCo/ZSM-5 catalysts for preferential CO oxidation in a hydrogen excessстатья
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Дата последнего поиска статьи во внешних источниках: 23 января 2026 г.
Аннотация:A new one-step method for the synthesis of the PtCo/ZSM-5 catalysts for CO oxidationwas proposed. Heteronuclear acetate complexes of the empirical compositionPtCox(AcO)y containing PtII and PtIV in ratios with Со of 1 : 1 or 1 : 2 were used as precursors.According to the data of scanning and transmission electron microscopy and XPS,the impregnation of the HZSM-5 zeolite (Si/Al = 28) with a solution of the complexes inglacial acetic acid followed by decomposition at 200 or 300 С leads to the stabilization ofhighly dispersed partially reduced Ptδ+ particles interacting with cobalt ions on the zeolitesurface. Their joint action and a possibility of formation of new Pt—Ox—Co sites activein the preferential oxidation of CO ensure high effi ciency and selectivity of the process inan Н2 excess. At the relatively low Pt content from 0.1 to 0.3 wt.%, the complete conversionof CO on these catalysts is achieved in the wide temperature range from 50 to 130 С.