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Novel synthetic approaches and TWC catalytic performance of flower-like Pt/CeO2

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Abstract

A novel Ultrasonic Assisted Membrane Reduction (UAMR)-hydrothermal method was used to prepare flower-like Pt/CeO2 catalysts. The texture, physical/chemical properties, and reducibility of the flower-like Pt/CeO2 catalysts were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), N2 adsorption, and hydrogen temperature programmed reduction (H2-TPR) techniques. The catalytic performance of the catalysts for treating automobile emission was studied relative to samples prepared by the conventional wetness impregnation method. The Pt/CeO2 catalysts fabricated by this novel method showed high specific surface area and metal dispersion, excellent three-way catalytic activity, and good thermal stability. The strong interaction between the Pt nanoparticles and CeO2 improved the thermal stability. The Ce4+ ions were incorporated into the surfactant chains and the Pt nanoparticles were stabilized through an exchange reaction of the surface hydroxyl groups. The SEM results demonstrated that the Pt/CeO2 catalysts had a typical three-dimensional (3D) hierarchical porous structure, which was favorable for surface reaction and enhanced the exposure degree of the Pt nanoparticles. In brief, the flower-like Pt/CeO2 catalysts prepared by UAMR-hydrothermal method exhibited a higher Pt metal dispersion, smaller particle size, better three-way catalytic activity, and improved thermal stability versus conventional materials.

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Authors and Affiliations

  1. Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China

    Zongcheng Zhan, Xiaojun Liu, Dongzhu Ma, Liyun Song, Jinzhou Li, Hong He & Hongxing Dai

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  1. Zongcheng Zhan
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  2. Xiaojun Liu
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  3. Dongzhu Ma
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  4. Liyun Song
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  5. Jinzhou Li
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  6. Hong He
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  7. Hongxing Dai
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Correspondence to Hong He.

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Zhan, Z., Liu, X., Ma, D. et al. Novel synthetic approaches and TWC catalytic performance of flower-like Pt/CeO2 . Front. Environ. Sci. Eng. 8, 483–495 (2014). https://doi.org/10.1007/s11783-013-0595-z

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  • DOI: https://doi.org/10.1007/s11783-013-0595-z

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