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  • Title: The First Study on the Reactivity of Water Vapor in Metal-Organic Frameworks with Platinum Nanocrystals.
    Author: Ogiwara N, Kobayashi H, Concepción P, Rey F, Kitagawa H.
    Journal: Angew Chem Int Ed Engl; 2019 Aug 19; 58(34):11731-11736. PubMed ID: 31267626.
    Abstract:
    We first studied the reactivity of H2 O vapor in metal-organic frameworks (MOFs) with Pt nanocrystals (NCs) through the water-gas shift (WGS) reaction. A water-stable MOF, UiO-66, serves as a highly effective support material for the WGS reaction compared with ZrO2 . The origin of the high catalytic performance was investigated using in situ IR spectroscopy. In addition, from a comparison of the catalytic activities of Pt on UiO-66, where Pt NCs are located on the surface of UiO-66 and Pt@UiO-66, where Pt NCs are coated with UiO-66, we found that the competitive effects of H2 O condensation and diffusion in the UiO-66 play important roles in the catalytic activity of Pt NCs. A thinner UiO-66 coating further enhanced the WGS reaction activity of Pt NCs by minimizing the negative effect of slow H2 O diffusion in UiO-66.
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