Research output: Contribution to journal › Article › peer-review
High-entropy perovskites LaM0.2Mn0.2Fe0.2Co0.2Ni0.2O3−δ (M = Cr, Ti) for ethanol steam reforming. / Hanna, Semon Amgad; Eremeev, Nikita; Leonova, Aleksandra et al.
In: Chimica Techno Acta, Vol. 13, No. 4, 10087, 13.07.2026.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - High-entropy perovskites LaM0.2Mn0.2Fe0.2Co0.2Ni0.2O3−δ (M = Cr, Ti) for ethanol steam reforming
AU - Hanna, Semon Amgad
AU - Eremeev, Nikita
AU - Leonova, Aleksandra
AU - Bulavchenko, Olga
AU - Glazneva, Tatiana
AU - Urlukov, Artem
AU - Ishchenko, Arcady
AU - Rogov, Vladimir
AU - Zilberberg, Igor
AU - Shubin, Aleksandr
AU - Sadykov, Vladislav
AU - Bespalko, Yulia
N1 - This work is supported by the Russian Federation Ministry of Science and Higher Education through the state research targets for the Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences (project no. FWUR-2024-0033).
PY - 2026/7/13
Y1 - 2026/7/13
N2 - Ethanol steam reforming is a promising route for hydrogen production from renewable sources, but catalyst deactivation caused by metal sintering and carbon deposition remains a major limitation. Hence, the search for novel stable catalysts is imperative. A promising approach is using the catalysts based on high-entropy perovskites, which possess high oxygen mobility and surface reactivity, as well as enhanced stability, which may contribute to the suppression of catalyst sintering and coke formation. In this study, the catalysts for ethanol steam reforming based on high-entropy perovskites La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3−δ (LCMFCN) and La(Ti0.2Mn0.2Fe0.2Co0.2Ni0.2)O3−δ (LTMFCN) were studied in comparison to the catalyst based on low-entropy perovskite LaMnO3−δ. The Ni-supported high-entropy perovskite catalysts showed improved ethanol steam reforming behavior compared with Ni/LaMnO3−δ, giving nearly complete ethanol conversion and H2/CO ratios above 3 at 700 °C. Among the studied catalysts, Ni/LCMFCN showed the strongest individual performance, reaching 99.84 % ethanol conversion, 54.99 % H2 yield, and H2/CO ratio of 3.38 at 700 °C. The 20 h stability test further showed that Ni/LCMFCN maintained nearly complete ethanol conversion with stable product selectivity. Post-reaction TEM analysis did not reveal massive carbon deposits blocking the catalyst surface. In the high-entropy perovskite-based catalysts, carbon was mainly observed in the form of filamentous carbon structures; no extensive surface-blocking coke layer was detected.
AB - Ethanol steam reforming is a promising route for hydrogen production from renewable sources, but catalyst deactivation caused by metal sintering and carbon deposition remains a major limitation. Hence, the search for novel stable catalysts is imperative. A promising approach is using the catalysts based on high-entropy perovskites, which possess high oxygen mobility and surface reactivity, as well as enhanced stability, which may contribute to the suppression of catalyst sintering and coke formation. In this study, the catalysts for ethanol steam reforming based on high-entropy perovskites La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3−δ (LCMFCN) and La(Ti0.2Mn0.2Fe0.2Co0.2Ni0.2)O3−δ (LTMFCN) were studied in comparison to the catalyst based on low-entropy perovskite LaMnO3−δ. The Ni-supported high-entropy perovskite catalysts showed improved ethanol steam reforming behavior compared with Ni/LaMnO3−δ, giving nearly complete ethanol conversion and H2/CO ratios above 3 at 700 °C. Among the studied catalysts, Ni/LCMFCN showed the strongest individual performance, reaching 99.84 % ethanol conversion, 54.99 % H2 yield, and H2/CO ratio of 3.38 at 700 °C. The 20 h stability test further showed that Ni/LCMFCN maintained nearly complete ethanol conversion with stable product selectivity. Post-reaction TEM analysis did not reveal massive carbon deposits blocking the catalyst surface. In the high-entropy perovskite-based catalysts, carbon was mainly observed in the form of filamentous carbon structures; no extensive surface-blocking coke layer was detected.
KW - bioethanol
KW - steam reforming
KW - high-entropy oxides
KW - perovskites
KW - DFT calculations
UR - https://www.mendeley.com/catalogue/68d399ce-ca65-38ce-b477-bfb80a08f096/
U2 - 10.15826/chimtech.10087
DO - 10.15826/chimtech.10087
M3 - Article
VL - 13
JO - Chimica Techno Acta
JF - Chimica Techno Acta
SN - 2409-5613
IS - 4
M1 - 10087
ER -
ID: 84005067