Sciact
  • EN
  • RU

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

Journal Inorganic Chemistry
ISSN: 0020-1669 , E-ISSN: 1520-510X
Output data Year: 2025, DOI: 10.1021/acs.inorgchem.5c04371
Tags Anions, Cluster chemistry, Evolution reactions, Inorganic carbon compounds, Photocatalysts
Authors 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
Affiliations
1 Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, Russian Federation
2 Nikolaev Institute of Inorganic Chemistry SB RAS, 630090 Novosibirsk, Russian Federation

Funding (2)

1 Ministry of Science and Higher Education of the Russian Federation FWUR-2024-0036
2 Russian Science Foundation 22-73-10174 (122082500075-8)

Abstract: 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.
Cite: 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 AN PMID OpenAlex
Dates:
Submitted: Sep 17, 2025
Accepted: Dec 8, 2025
Published online: Dec 22, 2025
Identifiers:
Web of science: WOS:001644770600001
Chemical Abstracts: 2025:3179712
PMID: 41427787
OpenAlex: W7116669512
Citing:
DB Citing
OpenAlex Нет цитирований
Altmetrics: