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首页> 外文期刊>Advanced functional materials >Uniform Si-Infused UiO-66 as a Robust Catalyst Host for Efficient CO_2 Hydrogenation to Methanol
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Uniform Si-Infused UiO-66 as a Robust Catalyst Host for Efficient CO_2 Hydrogenation to Methanol

机译：Uniform Si-Infused UiO-66 as a Robust Catalyst Host for Efficient CO_2 Hydrogenation to Methanol

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摘要

Due to the weak nature of organic coordination bonds, metal–organic frameworks(MOFs) can hardly retain their intrinsic physicochemical propertiesand structural integrity when functioning in harsh heterogeneous reactions.Herein, a post-synthetic strategy to reinforce the MOF structure by insertingsiliceous linkers inside is proposed, according to which a Si-infused UiO-66(s-UiO-66) with well-developed porosity and exceptional thermal/structuralstability is fabricated. This monodispersed Si-infused matrix with enlargednanopores is then utilized as the catalyst host, and is highly conductive toconfining ultrafine CuO nanoparticles with uniform dispersion. Targeting CO_2hydrogenation to methanol reaction, the Cu-loaded s-UiO-66 (CuO/s-UiO-66)delivers a remarkable and efficient methanol production rate outperformingother Cu/ZrO_2-based catalysts and the commercial catalyst. Moreover, therobust structure of CuO/s-UiO-66 prevents both copper phase and hostmaterial from aggregation during the catalyst preparation procedure andthe reaction. In addition to material-oriented studies, in situ characterizationtechniques are employed to identify the active Cu component and keyintermediates formed during the CO_2 hydrogenation reaction, separately. Itis envisioned that this Si infusion strategy can be applied to construct stablehost materials with boundary-defined structures from the pristine MOFs forbroadened applications under extreme circumstances.

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