Integrating S-scheme photocatalysis with tandem carbonylation: A green and scalable strategy for CO2 valorization

Feiyan Xu, Feifan Zhao, Xianyu Deng, Jinfeng Zhang (), Jianjun Zhang (), Chenbin Ai, Jiaguo Yu () and Hermenegildo García ()
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Feiyan Xu: China University of Geosciences
Feifan Zhao: China University of Geosciences
Xianyu Deng: China University of Geosciences
Jinfeng Zhang: Huaibei Normal University
Jianjun Zhang: China University of Geosciences
Chenbin Ai: China University of Geosciences
Jiaguo Yu: China University of Geosciences
Hermenegildo García: Universitat Politècnica de València

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract The rapid increase in atmospheric CO2 levels due to industrialization underscores the urgent need for innovative carbon valorization strategies. Photocatalytic CO2 reduction presents a sustainable solution; however, conventional systems suffer from inefficient charge separation and limited product applicability. Herein, a green and scalable tandem strategy is developed by integrating S-scheme photocatalysis with palladium-catalyzed carbonylation. A rationally designed CeO2/Bi2S3 heterojunction leverages its hierarchical structure, broad visible-light absorption, oxygen-vacancy-mediated charge dynamics, and the S-scheme charge transfer mechanism to achieve highly efficient photocatalytic CO2-to-CO conversion (14.05 mmol g−1, 98% selectivity). The generated CO is directly utilized in a subsequent carbonylation reaction under mild conditions, yielding high-value amides with near-quantitative CO utilization. This integrated approach eliminates the risks of CO handling and enhances economic viability, providing a direct and effective route for converting CO2 into fine chemicals. By bridging photocatalysis with industrial catalysis, this work advances sustainable carbon recycling technologies and opens avenues for the development of efficient CO2 conversion systems.

Date: 2025
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DOI: 10.1038/s41467-025-60961-5

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