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Noble-Metal-Free Photocatalyst System via BODIPY-Based MOFs for Highly Efficient Visible-Light-Driven H2 Evolution†

Abstract

Developing noble-metal-free photocatalyst system via metal–organic frameworks (MOFs) is very imperative and demanding. In this contribution, by employing pyridine-functionalized boron dipyrromethene (BODIPY) linker both as the light-harvesting antenna and organic struts in the presence of 4,4'-biphenyldicarboxylic acid (H2BPDC) or 4,4'-sulfonyldibenzoic acid (H2SDB) , two MOFs [Cd2(BODIPY)2(BPDC)2] (denoted as CCNU-11, CCNU= Central China Normal University) and [Cd2(BODIPY)2(SDB)2] (CCNU-12) with the identical topology structure can be reliably synthesized, featuring the same redox levels. In the presence of tris(bipyridine)cobalt ([Co(bpy)3]Cl2), CCNU-11 holds excellent photocatalytic activity of 60.4 mmol/g/h whereas that for CCNU-12 is 44.6 mmol/g/h under visible illumination (λ > 420 nm) with the use of triethylamine (TEA) as a sacrificial reagent. These remarkable values are among the highest ones reported thus far for MOFs with proton reduction co-catalysts. Moreover, the higher photocatalytic efficiency over CCNU-11+[Co(bpy)3]Cl2 probably benefit from the pore characteristics within CCNU-11. This work provides fundamental insight into the role of porosity in photocatalytic performance and is likely to inform ongoing efforts to exploit noble-metal-free photocatalytic systems via BODIPY-based MOFs for highly efficient and long-term solar fuels production.

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Publication details

The article was received on 29 Jun 2019, accepted on 02 Aug 2019 and first published on 09 Aug 2019


Article type: Paper
DOI: 10.1039/C9TA06989E
J. Mater. Chem. A, 2019, Accepted Manuscript

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    Noble-Metal-Free Photocatalyst System via BODIPY-Based MOFs for Highly Efficient Visible-Light-Driven H2 Evolution†

    H. Yang, M. Zhao, J. Ma, J. Zhang, P. Wu, W. Liu and L. Wen, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA06989E

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