Journal of Siberian Federal University. Engineering & Technologies / Evolution of Nanostructured Materials Produced by Separate Electrochemical Oxidation of Copper and Aluminum

Full text (.pdf)
Issue
Journal of Siberian Federal University. Engineering & Technologies. 2023 16 (5)
Authors
Usoltseva, Natalia V.; An, Vladimir V.; Damdinov, Bair B.
Contact information
Usoltseva, Natalia V.: National Research Tomsk Polytechnic University Tomsk, Russian Federation; ; An, Vladimir V.: National Research Tomsk Polytechnic University Tomsk, Russian Federation; Damdinov, Bair B.: National Research Tomsk Polytechnic University Tomsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation; Institute of Physical Material Science Siberian Branch of the RAS Ulan-Ude, Russian Federation
Keywords
electrolysis; nanomaterials; phase composition; aging
Abstract

This paper covers the results of the composition and structure evolution of nanostructured materials produced by separate electrochemical oxidation of metals (copper and aluminum). The electrolysis products after short-term and long-term aging were characterized by XRD (X‑ray diffraction) and DSC (differential scanning calorimetry) analysis. There is the difference in aging of nanostructures of copper- and aluminum-compounds. Short-term aging results in the phase transformation of copper (I) oxide and the stability of aluminum oxyhydroxide (boehmite). Copper (I) oxide is oxidized to copper (II) oxide and copper carbonate hydroxide. At long-term aging the oxidation of copper (I) oxide does not completed because the Pilling–Bedworth ratio for copper (II) oxide, copper carbonate hydroxide is greater than one. The structure of all copper-containing compounds (copper (I) oxide, copper (II) oxide, copper carbonate hydroxide) is changed. It results in the increases of both the interplanar spacing and the temperature of the phase transformations. Coherent scattering region (CSR) of boehmite and copper (I) oxide are 3–4 nm and 20–30 nm, respectively, and does not change at short-term and long-term aging

Pages
550–558
EDN
SQBFQO
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/150866

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