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Self‐assembly of a cobalt(II)‐based metal–organic framework as an effective water‐splitting heterogeneous catalyst for light‐driven hydrogen production
Author(s) -
Dou Yong,
Yang Lu,
Qin Lan,
Dong Yunhui,
Zhou Zhen,
Zhang Daopeng,
Wang Suna
Publication year - 2020
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229620007044
Subject(s) - water splitting , cobalt , catalysis , hydrogen production , photocatalysis , photocatalytic water splitting , crystallinity , metal organic framework , materials science , cyclic voltammetry , ethylene glycol , inorganic chemistry , chemistry , electrochemistry , photochemistry , crystallography , organic chemistry , adsorption , electrode
The solar photocatalysis of water splitting represents a significant branch of enzymatic simulation by efficient chemical conversion and the generation of hydrogen as green energy provides a feasible way for the replacement of fossil fuels to solve energy and environmental issues. We report herein the self‐assembly of a Co II ‐based metal–organic framework (MOF) constructed from 4,4′,4′′,4′′′‐(ethene‐1,1,2,2‐tetrayl)tetrabenzoic acid [or tetrakis(4‐carboxyphenyl)ethylene, H 4 TCPE] and 4,4′‐bipyridyl (bpy) as four‐point‐ and two‐point‐connected nodes, respectively. This material, namely, poly[(μ‐4,4′‐bipyridyl)[μ 8 ‐4,4′,4′′,4′′′‐(ethene‐1,1,2,2‐tetrayl)tetrabenzoato]cobalt(II)], [Co(C 30 H 16 O 8 )(C 10 H 8 N 2 )] n , crystallized as dark‐red block‐shaped crystals with high crystallinity and was fully characterized by single‐crystal X‐ray diffraction, PXRD, IR, solid‐state UV–Vis and cyclic voltammetry (CV) measurements. The redox‐active Co II atoms in the structure could be used as the catalytic sites for hydrogen production via water splitting. The application of this new MOF as a heterogeneous catalyst for light‐driven H 2 production has been explored in a three‐component system with fluorescein as photosensitizer and trimethylamine as the sacrificial electron donor, and the initial volume of H 2 production is about 360 µmol after 12 h irradiation.