Effect of the CeO2 synthesis method on the behaviour of Pt/CeO2 catalysis for the water-gas shift reaction |
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| Affiliation: | 1. Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano (SA), Italy;2. Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genoa, Italy;1. School of Environmental Sciences and Resource, Inner Mongolia University, No. 235 West College Road, Hohhot, Inner Mongolia 010021, PR China;2. Department of Chemical and Petroleum Engineering, University of Wyoming, WY 82070, USA;1. Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300350, China;2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300350, China;3. State Key Laboratory of Engines, Tianjin University, Tianjin 300350, China |
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| Abstract: | A comparative study of three different ceria synthesis procedures (template- and MW- assisted hydrothermal synthesis and urea homogeneous precipitation) is reported in this paper. The obtained materials were employed as supports for Pt nanoparticles, and the Pt/CeO2 catalysts were evaluated in the WGS reaction under model and realistic conditions. The influence of the support, e.g., its morphology and electronic properties, has been studied in detail by means of XRD, H2-TPR, XPS, UV–Vis spectroscopy and toluene hydrogenation (for metal dispersion assessment). The catalytic performance of the samples is directly correlated with the modification of the electronic properties, as a result of the preparation method used. The conventional homogeneous precipitation method with urea resulted to be the best option, leading to enhanced ceria reducibility and adequate Pt dispersion, which in turns resulted in a very efficient WGS catalyst. |
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| Keywords: | Urea precipitation Microwave-assisted synthesis Polymer-assisted synthesis WGS |
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