Article Dans Une Revue Advanced Energy Materials Année : 2025

Modulation of NH 2 ‐UiO‐66 Based MOFs for Gas Phase CO 2 Photocatalytic Reduction

Résumé

To solve both the greenhouse effect and energy crisis issues, direct capture and conversion of CO 2 appears as a promising contribution. Artificial photosynthesis is an encouraging and very attractive complementary way to convert CO 2 into high‐value‐added chemicals. Nevertheless, efficient CO 2 conversion remains challenging, mainly due to the poor CO 2 adsorption , the high activation energy required to break C═O bonds, and the slow dynamics of charge carriers in light‐harvesting materials. In recent years, some Metal‐organic frameworks (MOFs) have emerged in the photocatalysis field, especially due to their huge CO 2 adsorption capability and light‐harvesting properties behavior. In this study, a series of defective NH 2 ‐UiO‐66 MOF materials, using formic acid (FA) is synthesized as a modulating agent. Then, a series of binary (MOF/TiO 2 ) catalysts is obtained by varying the defective MOFs content, followed by further deposition of gold (Au) nanoparticles (NPs) to result in three‐component MOF/TiO 2 /Au composites. These composites are assessed for gas‐phase CO 2 photoreduction in the presence of water vapor as the only reducing agent. This hybrid ternary photocatalyst not only increases CO 2 adsorption but also promotes CH 4 formation. Among these resulting MOF/TiO 2 /Au samples, the optimized photocatalytic activity results in a mean production rate of 17.2 µmol.h −1 .g −1 catalyst of CH 4 , which is 6‐fold higher than the one observed for the reference TiO 2 /Au photocatalyst.

Dates et versions

hal-05382322 , version 1 (25-11-2025)

Identifiants

Citer

Marie Duflot, Clément Marchal, Vincent Artero, Konstantinos Christoforidis, Valérie Keller. Modulation of NH 2 ‐UiO‐66 Based MOFs for Gas Phase CO 2 Photocatalytic Reduction. Advanced Energy Materials, 2025, 15 (24), ⟨10.1002/aenm.202500104⟩. ⟨hal-05382322⟩
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