Design of Electro Catalytic Metal-Organic Framework Based Systems Through the Immobilization of Molecular Catalysts
Ran Shimoni a b, Itamar Librman a b, Idan Hod a b
a Department of Chemistry Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel .
b Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel .
nanoGe Fall Meeting
Proceedings of nanoGe Fall Meeting19 (NGFM19)
#SolFuel19. Solar Fuel Synthesis: From Bio-inspired Catalysis to Devices
Berlin, Germany, 2019 November 3rd - 8th
Organizers: Roel van de Krol and Erwin Reisner
Poster, Ran Shimoni, 363
Publication date: 16th July 2019

Currently, extensive research efforts are being put to develop efficient molecular catalysts for a variety of important, energy-related solar fuel reactions such as water splitting, and CO2 reduction. However, practical Realization heterogeneous electrochemical energy-conversion via molecular-type of electro-catalysis requires the assembly of large quantities of reactant accessible catalysts on conductive surfaces.

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 bottle-neck hindering the overall electro catalytic performance of these systems. In this works, we show two important whys to accelerate charge transport rates. first by a systematic control of MOF defect site density, one can modulate the spatial distribution of post synthetically-installed molecular catalyst. Second by adding Electron Donor Group that also accelerate charge transport rates by coordinate to the electro-active site and increase the electron density in the site. Moreover, the improved MOF-conductivity also yields an enhancement in its intrinsic electro catalytic activity. Consequently, these results offer new possibilities for designing efficient MOF-based electro catalytic systems.

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