Hybrid Salt of Mo6 Cluster and Keggin-Type Silicotungstate: Enhancing the Efficiency of Photocatalytic Hydrogen Evolution via S-Scheme Heterojunction Formation | Sciact - CRIS-система Института катализа

Hybrid Salt of Mo6 Cluster and Keggin-Type Silicotungstate: Enhancing the Efficiency of Photocatalytic Hydrogen Evolution via S-Scheme Heterojunction Formation Научная публикация

Журнал

Inorganic Chemistry
ISSN: 0020-1669 , E-ISSN: 1520-510X

Вых. Данные

Год: 2025, DOI: 10.1021/acs.inorgchem.5c04371

Ключевые слова

Anions, Cluster chemistry, Evolution reactions, Inorganic carbon compounds, Photocatalysts

Авторы

Polskikh Danil A. ¹ , Petunin Anton A. ² , Fazliev Timur R. ¹ , Selishchev Dmitry S. ¹ , Shestopalov Michael A. ² , Sukhikh Taisiya S. ² , Asanov Igor P. ² , Ivanov Anton A. ² , Vorotnikov Yuri A. ²

Организации

1	Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, Russian Federation
2	Nikolaev Institute of Inorganic Chemistry SB RAS, 630090 Novosibirsk, Russian Federation

Информация о финансировании (2)

1	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	FWUR-2024-0036
2	Российский научный фонд	22-73-10174 (122082500075-8)

In this study, we report the synthesis and characterization of a novel hybrid compound, [Mo6I8(H2O)6][α-SiW12O40]·12H2O (denoted as [MoI][SiW]), formed by the electrostatic interactions between a cationic molybdenum aqua complex and an anionic Keggin-type polyoxometalate (POM). The composition and phase purity of the compound were determined using single-crystal and powder X-ray diffraction analyses, X-ray photoelectron spectroscopy, and elemental analysis. Diffuse reflectance spectroscopy revealed an optical energy gap (Eg) of 2.0 eV, suggesting potential photocatalytic activity under visible light. Flat-band potential (EFB) measurements identified [MoI][SiW] as an n-type semiconductor with a conduction band (CB) potential of +0.4 V vs RHE and a valence band (VB) potential of +2.4 V vs RHE. While the VB potential is suitable for oxidation reactions, the CB potential is insufficient for hydrogen evolution, necessitating the formation of heterostructures with other photocatalysts. Photocatalytic experiments demonstrated that even a physical mixture of [MoI][SiW] with graphitic carbon nitride (g-C3N4) exhibits an 8-fold increase in activity for the hydrogen evolution reaction compared to pure g-C3N4. These results highlight the potential of hybrid materials combining molybdenum clusters and POMs for photocatalytic applications, particularly in the development of composites for efficient solar energy conversion.

Polskikh D.A. , Petunin A.A. , Fazliev T.R. , Selishchev D.S. , Shestopalov M.A. , Sukhikh T.S. , Asanov I.P. , Ivanov A.A. , Vorotnikov Y.A.
Hybrid Salt of Mo6 Cluster and Keggin-Type Silicotungstate: Enhancing the Efficiency of Photocatalytic Hydrogen Evolution via S-Scheme Heterojunction Formation
Inorganic Chemistry. 2025. DOI: 10.1021/acs.inorgchem.5c04371 WOS CAPlus PMID OpenAlex

Поступила в редакцию:	17 сент. 2025 г.
Принята к публикации:	8 дек. 2025 г.
Опубликована online:	22 дек. 2025 г.

Web of science:	WOS:001644770600001
Chemical Abstracts:	2025:3179712
PMID (PubMed):	41427787
OpenAlex:	W7116669512

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