Abstract: In transition metal oxides, introducing high concentrations of charge carriers can induce localized surface plasmon resonance (LSPR), akin to noble metals, thus broadening the photocatalyst's response spectrum. However, a lack of comprehensive theoretical understanding of LSPR limits its full exploitation in photocatalytic systems. In this study, we propose a strategy to regulate the hyper-release of LSPR in S-scheme heterojunctions. By leveraging Mie-Gans theory and hot electron transfer kinetics, we achieve a finely tuned balance between the trapping and release of LSPR-induced hot electrons through defect concentration optimization. Using femtosecond transient absorption spectroscopy, we distinguish LSPR-related signals in the infrared region and quantify the hot electron transfer efficiency in the heterojunction, providing compelling evidence for the hyper-release mechanism. An S-scheme heterojunction between monoclinic W18O49 and cubic CdS was constructed via an in-situ growth strategy without the use of noble metal co-catalysts, resulting in a composite that achieves an outstanding photocatalytic hydrogen evolution rate of 3125 µmol h−1 g−1, outperforming conventional designs. This work not only offers fresh insights into the electron dynamics of the LSPR effect but also sets a benchmark for designing plasmonic-semiconductor hybrid systems, opening new horizons for sustainable energy conversion technologies.

Cite: Du M. , Yang S. , Zhang J. , Syrtsov D.A. , Ghasemi J.B. , Fedin M.V. , Zhang L.
Hyper-release regulation of localized surface plasmon resonance in tungsten oxide for efficient S-scheme heterojunction photocatalysts
Journal of Materials Science and Technology. 2026. V.243. P.245-255. DOI: 10.1016/j.jmst.2025.05.016 WOS Scopus

Dates:

Published online:	May 30, 2025
Published print:	Feb 1, 2026

Identifiers:

Web of science:	WOS:001510725100001
Scopus:	2-s2.0-105007615543

Citing:

DB	Citing
Scopus	6
Web of science	5

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