Catalysts for ethanol dry reforming based on high-entropy perovskites

IF 6.5 1区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Catalysis Pub Date : 2025-02-17 DOI:10.1016/j.jcat.2025.116028

Nikita F. Eremeev, Semon A. Hanna, Ekaterina M. Sadovskaya, Aleksandra A. Leonova, Olga A. Bulavchenko, Arcady V. Ishchenko, Igor P. Prosvirin, Vladislav A. Sadykov, Yuliya N. Bespalko

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引用次数: 0

Abstract

Ethanol dry reforming is a promising way to produce syngas and hydrogen due to utilization of carbon dioxide and ability to produce ethanol using renewable sources. Main problem associated with ethanol dry reforming reaction is coke formation. Coking suppression can be achieved in a few ways including use of catalysts possessing required oxygen transport properties. High entropy oxides are of interest in application as catalysts for ethanol dry reforming and other reactions due to their structural stability, disordering features and tunability of functional properties. In this work, the catalysts based on Ni and multiple doped La manganites are studied. The oxides are synthesized by modified Pechini and citrate techniques, and the catalysts are prepared by wetness impregnation. The samples are characterized by XRD, TEM with EDX analysis, XPS. Oxygen transport and redox properties are studied by temperature-programmed isotope exchange of oxygen and reduction. According to structural and morphological studies, the samples are nanosized and form perovskite-like structure. The surface features of samples were characterized by XPS. The samples demonstrate a moderate oxygen mobility (D* up to ∼10^–12 cm²/s at 700 °C) required for catalytic operation and coking suppression. Tests in ethanol dry reforming demonstrated fine performance and good stability in the reaction conditions.

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来源期刊

Journal of Catalysis 工程技术-工程：化工

CiteScore

12.30

自引率

5.50%

发文量

447

审稿时长

31 days

期刊介绍： The Journal of Catalysis publishes scholarly articles on both heterogeneous and homogeneous catalysis, covering a wide range of chemical transformations. These include various types of catalysis, such as those mediated by photons, plasmons, and electrons. The focus of the studies is to understand the relationship between catalytic function and the underlying chemical properties of surfaces and metal complexes. The articles in the journal offer innovative concepts and explore the synthesis and kinetics of inorganic solids and homogeneous complexes. Furthermore, they discuss spectroscopic techniques for characterizing catalysts, investigate the interaction of probes and reacting species with catalysts, and employ theoretical methods. The research presented in the journal should have direct relevance to the field of catalytic processes, addressing either fundamental aspects or applications of catalysis.