Encapsulating a Co(II) Molecular Photocatalyst in Metal–Organic Framework for Visible-Light-Driven H2 Production: Boosting Catalytic Efficiency via Spatial Charge Separation

The photodriven H2 generation from water splitting, providing a high-performance energy source, has been recognized to be a promising pathway for solar energy conversion. However, the efficient charge separation for photocatalysts remains a critical issue. In this work, we have rationally encapsulat...

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Published in:ACS catalysis 2016-08, Vol.6 (8), p.5359-5365
Main Authors: Li, Zhe, Xiao, Juan-Ding, Jiang, Hai-Long
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Xiao, Juan-Ding
Jiang, Hai-Long
description The photodriven H2 generation from water splitting, providing a high-performance energy source, has been recognized to be a promising pathway for solar energy conversion. However, the efficient charge separation for photocatalysts remains a critical issue. In this work, we have rationally encapsulated a Co­(II) molecular photcatalyst, [CoII(TPA)­Cl]­[Cl] (TPA = tris­(2-pyridylmethyl)­amine), inside the cages of a metal–organic framework (MOF) photosensitizer, MIL-125-NH2, for visible-light-driven H2 production. This noble-metal-free composite photocatalyst facilitates the photoinduced charge transfer from MIL-125-NH2 to the Co­(II) complex and greatly improves the spatial charge separation, thus significantly boosting the photocatalytic efficiency of H2 production. In addition, MIL-125-NH2 behaves as a host matrix to achieve hetrogenization of the Co­(II) complex, and thus, the composite can be well-recycled.
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title Encapsulating a Co(II) Molecular Photocatalyst in Metal–Organic Framework for Visible-Light-Driven H2 Production: Boosting Catalytic Efficiency via Spatial Charge Separation
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