The First Study on the Reactivity of Water Vapor in Metal–Organic Frameworks with Platinum Nanocrystals |
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Authors: | Naoki Ogiwara Hirokazu Kobayashi Patricia Concepcin Fernando Rey Hiroshi Kitagawa |
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Institution: | Naoki Ogiwara,Hirokazu Kobayashi,Patricia Concepción,Fernando Rey,Hiroshi Kitagawa |
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Abstract: | We first studied the reactivity of H2O 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 H2O 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 H2O diffusion in UiO‐66. |
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Keywords: | Heterogene Katalyse Platin-Nanokristalle Metall-organische Gerü ste Wasser Wassergas-Shift-Reaktion |
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