High-Entropy Carbide as Cocatalyst for TiO2 in Photocatalytic CO2 Reduction | Sciact - CRIS-system of Boreskov Institute of Catalysis

High-Entropy Carbide as Cocatalyst for TiO2 in Photocatalytic CO2 Reduction Full article

Journal

Materials Today Energy
, E-ISSN: 2468-6069

Output data

Year: 2026, Volume: 56, Article number : 102206, Pages count : 14 DOI: 10.1016/j.mtener.2026.102206

Authors

Radina Aleksandra D. ¹ , Kurenkova Anna Yu. ^2,3 , Baidyshev Viktor S. ¹ , Povalyaev Pavel V. ⁴ , Saraev Andrey A. ^2,3 , Alekseev Roman F. ² , Lomakina Viktoriya A. ² , Aydakov Egor E. ³ , Gerasimov Evgeny Yu. ² , Mishchenko Denis D. ³ , Pak Alexander Ya. ⁴ , Kozlova Ekaterina A. ² , Kvashnin Alexander G. ¹

Affiliations

1	Skolkovo Institute of Science and Technology, 121205, Bolshoi Blv. 30, Building 1, Moscow, Russian Federation
2	Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 5 prosp. Lavrent’eva, 630090, Novosibirsk, Russian Federation
3	Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, 1 Nikolsky prosp., 630559, Koltsovo, Russian Federation
4	National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk 634050, Russian Federation

One of the major challenges in modern materials science is the development of new efficient functional materials for sustainable energy applications. We propose and investigate a novel cocatalyst for photocatalytic applications - high-entropy carbide HfTaZrNbTiC5 (HEC) synthesized by vacuumless electric arc plasma technique. A series of composite photocatalysts HEC/TiO2 with different mass contents of HEC are tested in CO2 reduction reaction under visible light irradiation and all samples showed significant improvement in CH4 production compared to unmodified TiO2. The highest rate achieved at 10 wt % HEC/TiO2 is equal to 3.5 μmol h−1 gcat−1, which is 7 times higher than that of TiO2. Density functional theory calculations of the proposed methanation reaction agreed with the provided experiments explaining the limiting reaction rate of methanation and confirming the higher efficiency of the composite catalysts compared to TiO2. The findings highlight HECs as a versatile platform for sustainable CO2 valorization and solar fuel generation.

Radina A.D. , Kurenkova A.Y. , Baidyshev V.S. , Povalyaev P.V. , Saraev A.A. , Alekseev R.F. , Lomakina V.A. , Aydakov E.E. , Gerasimov E.Y. , Mishchenko D.D. , Pak A.Y. , Kozlova E.A. , Kvashnin A.G.
High-Entropy Carbide as Cocatalyst for TiO2 in Photocatalytic CO2 Reduction
Materials Today Energy. 2026. V.56. 102206 :1-14. DOI: 10.1016/j.mtener.2026.102206 OpenAlex

Submitted:	Aug 14, 2025
Accepted:	Jan 16, 2026
Published online:	Jan 17, 2026
Published print:	Mar 1, 2026

OpenAlex:

W7124739521

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