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Updated: May 14, 2025

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Synergistic Conversion of Hydrogen Peroxide and Benzaldehyde in Air by Silver Single-Atom Modified
Xiaoyu Zhou1, Kuanhong Cao2, Shouqiang Huang3
1Institute for Innovative Materials and Energy, School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.
Abstract:
This study reports the synthesis of silver single-atom-loaded thiophene-conjugated carbon nitride (Ag@T─C3N4), a material with high carrier concentration and efficient carrier separation. Under visible light, Ag@T─C3N4 catalyzes hydrogen peroxide (H2O2) production and benzyl alcohol oxidation to benzaldehyde, achieving production rates of 4729.82 µmol·g-1·h-1 for H2O2 and 19.71 mmol·g-1·h-1 for benzaldehyde. The synergy between thiophene conjugation and silver atoms extends visible light absorption and accelerates the 2-electron oxygen reduction reaction (ORR), enhancing H2O2 yield. Photogenerated holes oxidize benzyl alcohol to benzaldehyde, while the biphasic benzaldehyde-water system enables spontaneous product separation. In situ Raman spectroscopy, rotating disk electrode testing, EPR, GC-MS, and DFT calculations highlight the critical role of thiophene-silver synergy in optimizing reaction pathways, enhancing catalyst-intermediate interactions, and reducing Gibbs free energy, improving H2O2 and benzaldehyde synthesis. This study provides new insights for designing carbon nitride-based photocatalysts and offers a strategy for co-producing value-added chemicals.
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