Photo-electrochemical O2 Reduction to H2O2 Using a Co-Porphyrin Based Metal-Organic Framework

Raya Ifraemov, Shahar Binyamin, Yanai Pearlmutter, Itamar Liberman, Ran Shimoni, Idan Hod

Research output: Contribution to journalArticlepeer-review

Abstract

Metal-Organic Frameworks (MOFs) hold great potential to be used as porous (photo)-electrocatalytic platforms containing large concentration of immobilized molecular catalysts. Indeed, the use of MOFs in a photo-electrochemical devices was recently demonstrated. However, so far there are no reports of MOFs used for photo-electrochemical O2 reduction to H2O2. Herein, we utilize a Co-porphyrin based MOF (Co-MOF-525), that produces H2O2 at high faradaic efficiency (95 %), both electrochemically and photo-electrochemically. Electrochemical characterization show that the active catalytic site is a MOF-tethered Co(I)-porphyrin. Additionally, under light illumination, the MOF's intrinsic catalytic rate is significantly accelerated compared to dark electrolysis conditions. Thus, this work could open a path for future implementation of photoactive MOFs in solar fuel schemes.

Original languageEnglish
Article numbere202300422
JournalChemElectroChem
Volume11
Issue number3
DOIs
StatePublished - 1 Feb 2024
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2024 The Authors. ChemElectroChem published by Wiley-VCH GmbH.

Funding

The authors thank the Ilse Katz Institute for Nanoscale Science and Technology for the technical support in material characterization. The project leading to this application has received funding from European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant agreement no. 947655. This work was also funded by the Israel Science Foundation (ISF) (Grant No. 1267/22). R. I. thanks the Arianne de Rothschild scholarship for female Ph.D. students from the Rothschild Foundation, and the Negev scholarship from the Ben-Gurion University of the Negev for financial support. The authors thank the Ilse Katz Institute for Nanoscale Science and Technology for the technical support in material characterization. The project leading to this application has received funding from European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant agreement no. 947655. This work was also funded by the Israel Science Foundation (ISF) (Grant No. 1267/22). R. I. thanks the Arianne de Rothschild scholarship for female Ph.D. students from the Rothschild Foundation, and the Negev scholarship from the Ben‐Gurion University of the Negev for financial support.

FundersFunder number
Arianne de Rothschild
Ilse Katz Institute for Nanoscale Science and Technology
Rothschild Foundation
European Research Council
Israel Science Foundation1267/22
Ben-Gurion University of the Negev
Horizon 2020947655

    Keywords

    • heterogenous catalysis
    • hydrogen peroxide generation
    • metal-organic frameworks
    • oxygen reduction reaction
    • photo-electrochemical cells
    • rotating ring-disk electrode

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