Abstract: Advances in the development of photocatalytic hydrogen production are determined by the creation of technologies to synthesize highly active catalysts. In this work, a simple and effective approach to increasing the activity of defective dark TiO2 in photocatalytic hydrogen evolution reaction (HER) is implemented, based on self-dispersing of (CuOx)n over the titania surface. The use of aggregated (CuOx)n clusters obtained by pulsed laser ablation, the presence of oxygen-deficient Ti3+ states in dark TiO2 playing the role of an “anchor” to fix CuOx clusters, and the presence of surface Ti4+–OH groups facilitating the production of atomically dispersed Cu species allow achieving high performance. The conditions of interaction between dark TiO2 and (CuOx)n from simple mechanical mixtures to samples obtained by impregnation determine the state and dispersing of Cu-containing species on the catalyst surface and photocatalytic properties. The catalysts are studied by XRD, TEM, XPS, and UV–vis spectroscopy. The dispersing efficiency of (CuOx)n on the dark TiO2 surface correlates with the increase in the AQY in photocatalytic HER. The maximum AQY of H2 in a water-glycerol mixture under LED irradiation (λ = 375 nm) is 55.3%, which is comparable to the best results for the (CuOx)n-TiO2 catalysts.

Cite: Reutova O.A. , Fakhrutdinova E.D. , Stonkus O.A. , Kibis L.S. , Vodyankina O.V. , Svetlichnyi V.A.
Self-Dispersing of (CuOx)n Species on Dark TiO2 Surface as a Key to High-Performance HER Photocatalysts
ChemCatChem. 2025. e00594 :1-13. DOI: 10.1002/cctc.202500594 WOS

Dates:

Submitted:	Mar 31, 2025
Accepted:	May 22, 2025
Published online:	Jun 6, 2025

Identifiers:

Web of science:

WOS:001503784300001

Citing: Пока нет цитирований

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