Journal
DALTON TRANSACTIONS
Volume 50, Issue 1, Pages 384-390Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt03500a
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Funding
- National Basic Research Program of China [2017YFA0303504]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
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This study presents a new CO2 reduction photocatalyst UiO-68-Fe-bpy based on a Zr(IV)-MOF platform, with enhanced photocatalytic activity attributed to the elongated excited state lifetime of Fe(bpy)Cl3. Metal-organic frameworks show great potential as a next generation platform for solar fuel conversion.
Metal-organic frameworks (MOFs) represent an emerging class of platforms to assemble single site photocatalysts for artificial photosynthesis. In this work, we report a new CO2 reduction photocatalyst (UiO-68-Fe-bpy) based on a robust Zr(IV)-MOF platform with incorporated Fe(bpy)Cl-3 (bpy refers to the 4 '-methyl-[2,2 '-bipyridine] moiety) via amine-aldehyde condensation. We show that this hybrid catalyst can reduce CO2 to form CO under visible light illumination with excellent selectivity and enhanced activity with respect to its parent MOF and corresponding homogeneous counterpart. Using steady state and transient absorption (TA) spectroscopy, we show that the enhanced photocatalytic activity of UiO-68-Fe-bpy is attributed to the elongated excited state lifetime of Fe(bpy)Cl-3 after being incorporated to the UiO-68-NH2 platform. This work demonstrates the great potential of MOFs as a next generation platform for solar fuel conversion.
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