CATALYTIC PROPERTIES IN THE HETEROGENEOUS FENTON REACTION OF THE SURFACE OF NANOPOROUS IRON OBTAINED BY ELECTROCHEMICAL DEALOIYNG IN MELTED CHLORIDE MIXTURES

• Published in: Fiziko-himičeskie aspekty izučeniâ klasterov, nanostruktur i nanomaterialov (Online) no. 13; pp. 919 - 927
• Main Authors: D.A. Rozhentsev, R.R. Mansurov, N.K. Tkachev, O.V. Russkikh, A.A. Ostroushko
• Format: Journal Article
• Language: Russian
• Published: Tver State University 01-12-2021
• Subjects: catalytic activity; dealloying; fenton reaction; iron oxide whiskers; nanoporous iron
• ISSN: 2226-4442; 2658-4360
• DOI: 10.26456/pcascnn/2021.13.919

The samples of partially oxidized micro- and nanoporous iron obtained by high-temperature dealloing of an iron-manganese alloy in a molten salt were investigated. The data concerning the structure of the samples and the composition of their surface were obtained by electron microscopy; it was found that after washing at room temperature in air the oxide phases of iron were formed as whiskers with a thickness of about 10 nm. During the preparation of the samples a quantitative removal of manganese from the initial alloy was achieved. The catalytic activity of the obtained samples in the heterogeneous Fenton reaction was estimated by oxidation of methyl orange by hydrogen peroxide. The rate of the first stage of the reaction, which was described by the first-order equation, was determined by the most active spent part of the samples, and then the reaction passed into the stationary mode. The nanoporous samples possessed a higher catalytic activity.