Enhanced ternary composite system Potassium-Cucurbit[6]uril-Ruthenium metal-support interactions in a heterogeneous system to facilitate photocatalytic nitrogen activation
Year: 2025
Type: article
Abstract: The K-Ru/Q[6] catalyst, a ternary composite of Potassium, Cucurbit[6]uril, and Ruthenium, was developed to boost photocatalytic nitrogen reduction. It showed significantly higher activity for ammonia synthesis than Q[6] alone. Incorporating potassium increased the ammonia production rate to 12.5 μmol g⁻¹‧h⁻¹, a 2.3 times improvement over Ru/Q[6]. This enhancement is due to potassium ions strengthening the metal-support interaction (MSI) between Ru and Q[6], reducing electron-hole recombination and improving charge transfer. Characterizations using XPS, PL, EIS, UV-Vis DRS, and H₂-TPR revealed that potassium ions enhance electron mobility and lower the band gap. This study introduces a new photocatalyst for ammonia synthesis and offers insights into modulating catalytic activity via MSI.
Source: Figshare
Authors: Tian, Fei-Yang, Cheng, Rui-Xue, Zhao, Hua-Jun, Li, Chang-Jiang, Chen, Kai
Language: English
Subfield: Catalysis
Field: Chemical Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6902344461
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