Tuning of Redox Conductivity and Electrocatalytic Activity in Metal-Organic Framework Films Via Control of Defect Site Density

Ran Shimoni, Wenhui He, Itamar Liberman, Idan Hod

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

Redox-active Metal-Organic Frameworks (MOFs) are considered as promising platforms for assembling high quantities of solution-accessible molecular catalysts on conductive surfaces, toward their utilization in electrochemical solar fuel related reactions. Nevertheless, slow redox hopping-based conductivity often constitutes a kinetic bottleneck hindering the overall electrocatalytic performance of these systems. In this work, we show that, by a systematic control of MOF defect site density, one can modulate the spatial distribution of post synthetically installed molecular catalyst and hence accelerate charge transport rates by an order of magnitude. Moreover, the improved MOF conductivity also yields an enhancement in its intrinsic electrocatalytic activity. Consequently, these results offer new possibilities for designing efficient MOF-based electrocatalytic systems.

Original languageEnglish
Pages (from-to)5531-5539
Number of pages9
JournalJournal of Physical Chemistry C
Volume123
Issue number9
DOIs
StatePublished - 7 Mar 2019
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

Funding

We thank the Ilse Katz Institute for Nanoscale Science and Technology for the technical support in material characterization. This research was supported by the Israel Science Foundation (Grant No. 306/18). W.H. thanks the Planning and Budgeting Committee's fellowship for the financial support. We thank the Ilse Katz Institute for Nanoscale Science and Technology for the technical support in material characterization. This research was supported by the Israel Science Foundation (Grant No. 306/18). W.H. thanks the Planning and Budgeting Committee’s fellowship for the financial support.

FundersFunder number
Ilse Katz Institute for Nanoscale Science and Technology
Israel Science Foundation306/18

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