A metal-organic framework film with a switchable anodic and cathodic behaviour in a photo-electrochemical cell

Raya Ifraemov; Ran Shimoni; Wenhui He; Guiming Peng; Idan Hod

doi:10.1039/C8TA10483B

A metal-organic framework film with a switchable anodic and cathodic behaviour in a photo-electrochemical cell

Raya Ifraemov, Ran Shimoni, Wenhui He, Guiming Peng, Idan Hod

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Photo-active metal-organic frameworks (MOFs) are considered as promising materials for the study of photo-electrochemical cells (PECs). They can be utilized as porous, high surface area scaffolds for the assembly of molecular chromophores atop semiconducting electrodes. Usually, however, the lack of prominent electronic interactions between adjacent MOF-installed chromophores impedes the development of PECs based solely on MOFs (without the use of a semiconducting electrode, e.g. TiO ₂ ). Here we demonstrate that unlike standard semiconducting photo-electrodes, the photo-electrochemical behavior of a MOF-based electrode can be switched from photo-anodic to photo-cathodic by using appropriate redox mediators in the electrolyte. Additionally, a proof-of-principle photo-electrocatalytic H ₂ production using a MOF-based photo-cathode is provided. Thus, these findings have a clear impact on the design of MOF-based PECs for solar fuel generation.

Original language	English
Pages (from-to)	3046-3053
Number of pages	8
Journal	Journal of Materials Chemistry A
Volume	7
Issue number	7
DOIs	https://doi.org/10.1039/C8TA10483B
State	Published - 1 Jan 2019

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1039/C8TA10483B

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abstract = " Photo-active metal-organic frameworks (MOFs) are considered as promising materials for the study of photo-electrochemical cells (PECs). They can be utilized as porous, high surface area scaffolds for the assembly of molecular chromophores atop semiconducting electrodes. Usually, however, the lack of prominent electronic interactions between adjacent MOF-installed chromophores impedes the development of PECs based solely on MOFs (without the use of a semiconducting electrode, e.g. TiO 2 ). Here we demonstrate that unlike standard semiconducting photo-electrodes, the photo-electrochemical behavior of a MOF-based electrode can be switched from photo-anodic to photo-cathodic by using appropriate redox mediators in the electrolyte. Additionally, a proof-of-principle photo-electrocatalytic H 2 production using a MOF-based photo-cathode is provided. Thus, these findings have a clear impact on the design of MOF-based PECs for solar fuel generation.",

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AU - Ifraemov, Raya

AU - Shimoni, Ran

AU - He, Wenhui

AU - Peng, Guiming

AU - Hod, Idan

PY - 2019/1/1

Y1 - 2019/1/1

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AB - Photo-active metal-organic frameworks (MOFs) are considered as promising materials for the study of photo-electrochemical cells (PECs). They can be utilized as porous, high surface area scaffolds for the assembly of molecular chromophores atop semiconducting electrodes. Usually, however, the lack of prominent electronic interactions between adjacent MOF-installed chromophores impedes the development of PECs based solely on MOFs (without the use of a semiconducting electrode, e.g. TiO 2 ). Here we demonstrate that unlike standard semiconducting photo-electrodes, the photo-electrochemical behavior of a MOF-based electrode can be switched from photo-anodic to photo-cathodic by using appropriate redox mediators in the electrolyte. Additionally, a proof-of-principle photo-electrocatalytic H 2 production using a MOF-based photo-cathode is provided. Thus, these findings have a clear impact on the design of MOF-based PECs for solar fuel generation.

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A metal-organic framework film with a switchable anodic and cathodic behaviour in a photo-electrochemical cell

Abstract

ASJC Scopus subject areas

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