Nanocatalysts for Carbon Monoxide Oxidation Based on Acid Modified Polyphase Aluminosilicate Support and Contained Palladium(II) and Copper(II) Salts

T.O. Kiosea, b, T.L. Rakitskayaa, b, A.A.A. Ennanb, Yu.I. Popruhaa aFaculty of Chemistry and Pharmacy, Odessa I.I. Mechnikov National University, Dvoryanskaya Str. 2, 65082 Odessa, Ukraine bPhysico-Chemical Institute of Environment and Human' Protection, Preobrazhenskaya Str. 3, 65082 Odessa, Ukraine

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Basalt tuff from Rivnes'ka Oblast' (Ukraine) was used as a support S̅ for catalysts containing palladium(II) and copper(II) salts as base components. XRD, FT-IR spectroscopy, and pH-metry were used for the characterization of natural basalt tuff (N-BT), its acid-modified forms, and palladium-copper catalysts based on these supports (K2PdCl4-Cu(NO3)2-KBr/S̅). Both natural and chemically modified basalt tuffs contain the following phases: clinoptilolite, mordenite, montmorillonite and also α-quartz and hematite. Crystallite sizes of the phases are in the range of 9 to 90 nm. It has been found that the catalytic activity of the Pd(II)-Cu(II)/3N-BT-0.5 compositions depends not only on the acid treatment duration (its optimal value is 0.5 h) but also on the nature of acids HNO3, H3PO4, H2SO4, and C6H8O7 (citric acid). Some catalytic compositions are suggested for use in devices intended for respiratory protection against carbon monoxide.

DOI:10.12693/APhysPolA.141.286 topics: natural and chemically modified basalt tuffs, carbon monoxide, catalysts, oxidation