铁酸铜和铝酸铜还原的原位x射线吸收光谱研究

IF 1.2 4区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Structural Chemistry Pub Date : 2025-05-07 DOI:10.1134/S0022476625040055

A. M. Kremneva, A. A. Saraev, D. D. Mishenko, E. V. Khramov, A. L. Trigub, V. V. Kaichev

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引用次数: 0

摘要

铁酸铜和铝酸铜催化剂在CO氧化反应中具有较高的活性。我们报道了CuFe2O4和CuAl2O4在温度范围从30°C到600°C的CO流动中还原的详细的x射线吸收光谱研究。结果表明，在CO流动中，铁酸铜和铝酸铜的还原导致金属铜的形成。在铁酸铜中，铜从Cu2+还原为Cu1+和Cu0的温度低于在铝酸铜中（高于400℃）的温度（250-300℃）。铁素体铜的还原也导致金属铁的形成，其过程为CuFe2O4→Fe3O4→FeO→Fe。

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In Situ X-Ray Absorption Spectroscopy Study of Copper Ferrite and Copper Aluminate Reduction

Catalysts based on copper ferrite and copper aluminate are highly active in the reaction of CO oxidation. We report a detailed in situ X-ray absorption spectroscopy study of CuFe₂O₄ and CuAl₂O₄ reduction in a CO flow in the temperature range from 30 °C to 600 °C. It is shown that the reduction of copper ferrite and copper aluminate in a CO flow leads to the formation of metallic copper. The reduction of copper from Cu²⁺ to Cu¹⁺ and Cu⁰ in copper ferrite occurs at lower temperatures (250-300 °C) than in copper aluminate (above 400 °C). The reduction of copper ferrite also leads to the formation of metallic iron as a result of the following stages: CuFe₂O₄ → Fe₃O₄ → FeO → Fe.

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来源期刊

Journal of Structural Chemistry 化学-无机化学与核化学

CiteScore

1.60

自引率

12.50%

发文量

142

审稿时长

8.3 months

期刊介绍： Journal is an interdisciplinary publication covering all aspects of structural chemistry, including the theory of molecular structure and chemical bond; the use of physical methods to study the electronic and spatial structure of chemical species; structural features of liquids, solutions, surfaces, supramolecular systems, nano- and solid materials; and the crystal structure of solids.