TY - JOUR

T1 - Catalysts for ethanol dry reforming based on high-entropy perovskites

AU - Eremeev, Nikita F.

AU - Hanna, Semon A.

AU - Sadovskaya, Ekaterina M.

AU - Leonova, Aleksandra A.

AU - Bulavchenko, Olga A.

AU - Ishchenko, Arcady V.

AU - Prosvirin, Igor P.

AU - Sadykov, Vladislav A.

AU - Bespalko, Yuliya N.

N1 - This work is supported by Russian Science Foundation and Government of the Novosibirsk Region (Project No. 24-23-20119).

PY - 2025/5

Y1 - 2025/5

N2 - 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.

AB - 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.

KW - Bioethanol

KW - Carbon dioxide

KW - Dry reforming

KW - High-entropy oxides

KW - Isotope exchange

KW - Oxygen diffusion

UR - https://www.mendeley.com/catalogue/9a9e3952-eb74-3aa1-bc7a-c50e8b9548dc/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85219091368&origin=inward&txGid=07a58a1d716d6c51d15f51c4ab42fc7f

U2 - 10.1016/j.jcat.2025.116028

DO - 10.1016/j.jcat.2025.116028

M3 - Article

VL - 445

JO - Journal of Catalysis

JF - Journal of Catalysis

SN - 0021-9517

M1 - 116028

ER -