A dual-species ruthenium-decorated decatungstate photocatalyst enables the visible-light-driven selective oxidation of hydrocarbons using nitrous oxide under mild conditions, according to a study published by researchers Bo Yang, Shigeng Li, Yubo Zengzhao, Zaihui Fu, and Ming Yang in Catalysis Letters.
Developing oxidation systems that utilize nitrous oxide to functionalize hydrocarbons under gentle conditions addresses a longstanding challenge in chemical synthesis and environmental catalysis, arising from the pronounced chemical inertness of both reactant molecules. To overcome this limitation, the authors synthesized a decatungstate framework co-decorated with trivalent ruthenium ions and metallic ruthenium species, denoted as Ru3+-Ru/DT, through the partial reduction of decorated Ru3+ precursors using a glucose solution.
Physical and chemical characterizations confirmed that integrating Ru3+ ions alongside metallic Ru0 species substantially enhances the visible-light harvesting capability of the decatungstate material. Characterizations also support that the co-decorated species accelerate the separation and transfer of photogenerated charge carriers.
Mechanistically, the co-decorated catalyst operates through a synergistic pathway between the two ruthenium oxidation states. The strong coordination capacity provided by Ru3+ centers combined with the superior electron transport properties of metallic Ru0 domains promotes the activation of chemically stable nitrous oxide molecules into reactive oxygen species capable of driving selective hydrocarbon oxidation.
In catalytic trials conducted under ambient conditions of 25 to 28 degrees Celsius and 1 atmosphere of nitrous oxide, an optimized formulation containing 1 percent Ru3+-Ru/DT demonstrated pronounced catalytic efficiency. When applied to the selective oxidation of cyclohexane in an acetonitrile medium containing a strong acidic aqueous solution, the photocatalyst attained a 33.4 percent substrate conversion with an 86.7 percent product selectivity toward cyclohexanone.
The catalytic system also demonstrated activity across the nitrous oxide-assisted oxidation of other hydrocarbon substrates. Following catalytic operation, the initial photocatalytic performance was restored through a hydrothermal-acid regeneration treatment, demonstrating a recoverable catalytic strategy for visible-light-driven transformations involving inert gaseous oxidants.
Ru nanoparticles in the modified catalyst enhance visible-light harvesting and boost photoexcited charge separation and transfer.
Subject of Research: Photocatalytic selective oxidation of hydrocarbons using nitrous oxide over ruthenium-decorated decatungstate
Article Title: Ru-Decorated Decatungstate as a Highly Efficient Photocatalyst for Visible-Light-Driven Selective Oxidation of Hydrocarbons with N2O
Article References: Yang, B., Li, S., Zengzhao, Y., Fu, Z., & Yang, M. (2026). Ru-Decorated Decatungstate as a Highly Efficient Photocatalyst for Visible-Light-Driven Selective Oxidation of Hydrocarbons with N2O. Catalysis Letters, 156(12), Article 330. https://doi.org/10.1007/s10562-026-05545-8
Image Credits: AI Generated
DOI: 10.1007/s10562-026-05545-8
Keywords: photocatalysis, decatungstate, ruthenium, nitrous oxide, hydrocarbon oxidation, cyclohexane, cyclohexanone, visible light, charge carrier separation, glucose reduction, active oxygen species, electron transport, heterogeneous catalysis, catalyst regeneration, acetonitrile, mild reaction conditions, selective oxidation