Volume 64, Issue 17 e202424537
Scientific Perspective

Revisiting Photocatalytic CO2 Reduction to Methanol: A Perspective Focusing on Metal-Organic Frameworks

Vitor Fernandes de Almeida

Vitor Fernandes de Almeida

Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46022 Spain

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Sergio Navalón

Corresponding Author

Sergio Navalón

Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46022 Spain

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Amarajothi Dhakshinamoorthy

Corresponding Author

Amarajothi Dhakshinamoorthy

Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46022 Spain

School of Chemistry, Madurai Kamaraj University, Madurai, 625021 Tamil Nadu, India

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Hermenegildo Garcia

Corresponding Author

Hermenegildo Garcia

Instituto de Tecnología Química (CSIC-UPV), Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s/n, 46022 Valencia, Spain

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First published: 21 February 2025
Citations: 3

Graphical Abstract

Photocatalytic CO2 reduction to CH3OH, particularly using metal-organic framework (MOF) photocatalyst, has received considerable attention due to its long-term potential to harness sunlight for converting CO2 into this valuable fuel. This Perspective outlines the best practices that to provide robust and convincing evidence that CO2 is the source of CH3OH in the photocatalytic reactions.

Abstract

Photocatalytic CO2 reduction to CH3OH, particularly with metal-organic frameworks (MOFs) as photocatalysts, has garnered significant attention due to its long-term potential to harness sunlight for converting CO2 into a valuable fuel and chemical feedstock. Numerous studies in the literature report the successful formation of CH3OH from photocatalytic CO2 reduction, sometimes supplemented with sacrificial agents, with claims substantiated by isotopic labelling measurements. However, in this Scientific Perspective, we note that much of the existing evidence has not been obtained under sufficiently rigorous experimental conditions to conclusively confirm the formation of a highly reactive product like CH3OH from the chemically stable CO2 molecule. This Scientific Perspective outlines best practices designed to provide robust evidence for CH3OH formation in photocatalytic processes, which could be instrumental in clarifying the state-of-the-art and accelerating the development of this technology toward practical applications.

Conflict of Interests

The authors declare no conflict of interest.

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