journal article·2026-04Open access

Basal Plane Activation of SnS 2 Thin‐Film by Fluorine Doping for Selective Solar‐Driven CO 2 Reduction With Enhanced Quantum Efficiency

Tadios Tesfaye Mamo, Mohammad Qorbani, Adane Gebresilassie Hailemariam, Putikam Raghunath, Che‐Men Chu, Wen‐Hsin Yuan, Amr Sabbah, Yen‐Yu Wang, Shuo‐Yun Chang, Ming‐Chang Lin, Wei‐Yen Woon, Yu‐Jung Lu, Heng‐Liang Wu, Ken‐Tsung Wong, Kuei‐Hsien Chen, Li‐Chyong Chen

Advanced Science· Volume 13· Issue 21

Abstract

ABSTRACT Photocatalytic conversion of CO 2 into value‐added fuels offers a viable approach to combat climate change and address global energy demands. Here, we present a fluorine‐doped SnS 2 thin film with sulfur vacancy (i.e., S V ‐SnS 2 :F), prepared via thermal evaporation, post‐sulfurization, and fluorine ion‐implantation. Substitution of sulfur with fluorine and sulfur vacancy formation changes the product selectivity from CH 4 to CO with about 40‐fold enhanced yield and boosted internal quantum efficiency ( IQE ) of 0.52%. Transient absorption, in situ near‐ambient pressure X‐ray photoelectron, and in situ Fourier transform infrared spectroscopies, along with first‐principles density functional theory calculations, suggest that nearest‐neighbor Sn to F serves as an active site and stabilizes the *COOH intermediate. Our findings shed light on how F doping activates the nearby elements and its crucial role in intermediate stabilization toward selectivity change in a heterogeneous photocatalysis process.
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Research context

OpenAlex topics: Advanced Photocatalysis Techniques · CO2 Reduction Techniques and Catalysts · Chemical Looping and Thermochemical Processes

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Condensed Matter Sciences National Taiwan University Taipei Taiwan

Center of Atomic Initiative For New Materials National Taiwan University Taipei Taiwan

Department of Chemistry National Taiwan University Taipei Taiwan

Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan

Undergraduate Program of Electro‐Optical Engineering National Taiwan Normal University Taipei Taiwan

Institute of Electro‐Optical Engineering National Taiwan Normal University Taipei Taiwan

Department of Chemistry College of Natural Science Dire Dawa University Dire Dawa Ethiopia

Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu Taiwan

Department of Physics National Central University Jungli Taiwan

Tabbin Institute For Metallurgical Studies Helwan Cairo Egypt

Department of Physics National Taiwan University Taipei Taiwan

Research Center For Applied Sciences Academia Sinica Taipei Taiwan

Department of Chemistry National Tsing‐Hua University Hsinchu Taiwan

National Synchrotron Radiation Research Center Hsinchu Taiwan

Funding

Academia Sinica

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