TY - JOUR

T1 - Molecular nickel precursors for g-C3N4 modification in visible light driven photocatalytic CO2 reduction

AU - Zhurenok, A. V.

AU - Sakhapov, I. F.

AU - Ermoshkina, A. E.

AU - Mischenko, D. D.

AU - Kremneva, A. M.

AU - Lomakina, V. A.

AU - Gerasimov, E. Yu

AU - Kozlova, E. A.

AU - Yakhvarov, D. G.

N1 - A.V. Zhurenok, I.F. Sakhapov, A.E. Ermoshkina, D.D. Mischenko, A.M. Kremneva, V.A. Lomakina, E.Yu. Gerasimov, E.A. Kozlova, D.G. Yakhvarov, Molecular nickel precursors for g-C3N4 modification in visible light driven photocatalytic CO2 reduction, International Journal of Hydrogen Energy, Volume 272, 2026, 157310, ISSN 0360-3199, https://doi.org/10.1016/j.ijhydene.2026.157310. The work was financially supported by Russian Science Foundation No. 24-43-03010. The XPS, XRD, UV-vis spectroscopy, HR TEM experiments were performed using the facilities of the shared research center “National Center of Investigation of Catalysts” at Boreskov Institute of Catalysis. Authors thank Dr. A.A. Saraev for IR-spectroscopy analysis and Dr. E.A. Mel'gunova for BET analysis.

PY - 2026/9/28

Y1 - 2026/9/28

N2 - In this work, we propose an approach to modifying g-C3N4 with Ni-containing precursors – the organonickel σ-complex [NiBr(Pmp)(bpy)], where Pmp – 2,3,4,5,6-pentamethylphenyl, bpy – 2,2′-bipyridine, and nickel dibromide complex [NiBr2(bpy)2]. The resulting photocatalysts were studied in photocatalytic CO2 reduction under visible light (λ = 410 nm). The nature of σ-bound to nickel centre aromatic group was found to have a crucial influence on the properties and catalytic activity of the resulting photocatalysts. The most active photocatalyst, [NiBr(Pmp)(bpy)]/g-C3N4 (0.5 wt% Ni), provided a total CO2 reduction rate of about 12 μmol g−1 h−1, with CO being the main reaction product. It was established that modification of g-C3N4 with [NiBr(Pmp)(bpy)] complex leads to the formation of dispersed Ni-containing surface centers that facilitate the separation and transfer of photogenerated charges. The obtained results demonstrate the potential of using organonickel complexes as cocatalyst precursors for the targeted modification of g-C3N4 in photocatalytic CO2 reduction.

AB - In this work, we propose an approach to modifying g-C3N4 with Ni-containing precursors – the organonickel σ-complex [NiBr(Pmp)(bpy)], where Pmp – 2,3,4,5,6-pentamethylphenyl, bpy – 2,2′-bipyridine, and nickel dibromide complex [NiBr2(bpy)2]. The resulting photocatalysts were studied in photocatalytic CO2 reduction under visible light (λ = 410 nm). The nature of σ-bound to nickel centre aromatic group was found to have a crucial influence on the properties and catalytic activity of the resulting photocatalysts. The most active photocatalyst, [NiBr(Pmp)(bpy)]/g-C3N4 (0.5 wt% Ni), provided a total CO2 reduction rate of about 12 μmol g−1 h−1, with CO being the main reaction product. It was established that modification of g-C3N4 with [NiBr(Pmp)(bpy)] complex leads to the formation of dispersed Ni-containing surface centers that facilitate the separation and transfer of photogenerated charges. The obtained results demonstrate the potential of using organonickel complexes as cocatalyst precursors for the targeted modification of g-C3N4 in photocatalytic CO2 reduction.

KW - Nickel complex

KW - Photocatalytic CO2reduction

KW - Renewable energy

KW - Visible light

KW - g-C3N4

KW - Возобновляемая энергия

KW - Фотокаталитическое восстановление CO2

KW - Видимый свет

KW - g-C3N4

KW - Комплекс никеля

UR - https://www.mendeley.com/catalogue/b20b270d-1ca0-3bad-a405-4b2319887340/

UR - https://www.scopus.com/pages/publications/105049044306

U2 - 10.1016/j.ijhydene.2026.157310

DO - 10.1016/j.ijhydene.2026.157310

M3 - Article

VL - 272

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

M1 - 157310

ER -