Cu-Metalated Porphyrin-Based MOFs Coupled with Anatase as Photocatalysts for CO 2 Reduction: The Effect of Metalation Proportion

Maria Anagnostopoulou, Valérie Keller and Konstantinos C. Christoforidis ()
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Maria Anagnostopoulou: Institut de Chimie et Procédés Pour l’Energie, l’Environnement et la Santé, (ICPEES) UMR7515 CNRS, ECPM, University of Strasbourg, 25 Rue Becquerel, Cedex 2, 67084 Strasbourg, France
Valérie Keller: Institut de Chimie et Procédés Pour l’Energie, l’Environnement et la Santé, (ICPEES) UMR7515 CNRS, ECPM, University of Strasbourg, 25 Rue Becquerel, Cedex 2, 67084 Strasbourg, France
Konstantinos C. Christoforidis: Institut de Chimie et Procédés Pour l’Energie, l’Environnement et la Santé, (ICPEES) UMR7515 CNRS, ECPM, University of Strasbourg, 25 Rue Becquerel, Cedex 2, 67084 Strasbourg, France

Energies, 2024, vol. 17, issue 6, 1-12

Abstract: Converting carbon dioxide (CO 2 ) into valuable chemicals such as fossil resources via photocatalysis requires the development of advanced materials. Herein, we coupled zirconium-based metal–organic frameworks (MOFs) containing porphyrin and Cu-porphyrin with anatase TiO 2 . The effect of the porphyrin metalation proportion was also investigated. Notably, while the use of free-base porphyrin as the organic linker resulted in the development of PCN-224, the presence of Cu-porphyrin provided mixed-phase MOF structures containing both PCN-224 and PCN-222. MOF/TiO 2 composites bearing partial (50%) metalated porphyrin were proven more active and selective towards the production of CH 4 , at ambient conditions, in the gas phase and using water vapors without the use of hole scavengers. The optimized composite bearing 15 wt.% of the partial metalated MOF was three times more active than pure TiO 2 towards CH 4 production. This study provides insights on the effect of precise materials engineering at a molecular level on the development of advanced MOF-based photocatalysts for CO 2 reduction.

Keywords: metal–organic frameworks; CO 2; composites; TiO 2; photocatalysis; PCN; metalated porphyrin (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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