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Graphene-Supported Ultrafine Metal Nanoparticles Encapsulated by Mesoporous Silica: Robust Catalysts for Oxidation and Reduction Reactions

Authors

  • Dr. Lu Shang,

    1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (P. R. China)
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  • Tong Bian,

    1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (P. R. China)
    2. University of Chinese Academy of Sciences, Beijing 100049 (P. R. China)
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  • Baihui Zhang,

    1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (P. R. China)
    2. University of Chinese Academy of Sciences, Beijing 100049 (P. R. China)
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  • Dr. Donghui Zhang,

    1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (P. R. China)
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  • Prof. Li-Zhu Wu,

    1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (P. R. China)
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  • Prof. Chen-Ho Tung,

    1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (P. R. China)
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  • Prof. Yadong Yin,

    Corresponding author
    1. Department of Chemistry, University of California, Riverside, CA 92521 (USA)
    • Yadong Yin, Department of Chemistry, University of California, Riverside, CA 92521 (USA)

      Tierui Zhang, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (P. R. China)

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  • Prof. Tierui Zhang

    Corresponding author
    1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (P. R. China)
    • Yadong Yin, Department of Chemistry, University of California, Riverside, CA 92521 (USA)

      Tierui Zhang, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (P. R. China)

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  • We acknowledge support from the Ministry of Science and Technology of China (2014CB239402, 2013CB834505), the National Natural Science Foundation of China (51322213, 20901081, 51172245, 91127005, 21201172), the Knowledge Innovation Project of the Chinese Academy of Sciences (KGCX2-EW-311-3), and the 100 Talents Program of the Chinese Academy of Sciences. Y.Y. also thanks the U.S. Department of Energy (DE-FG02-09ER16096) for financial support.

Abstract

Graphene nanosheet-supported ultrafine metal nanoparticles encapsulated by thin mesoporous SiO2 layers were prepared and used as robust catalysts with high catalytic activity and excellent high-temperature stability. The catalysts can be recycled and reused in many gas- and solution-phase reactions, and their high catalytic activity can be fully recovered by high-temperature regeneration, should they be deactivated by feedstock poisoning. In addition to the large surface area provided by the graphene support, the enhanced catalytic performance is also attributed to the mesoporous SiO2 layers, which not only stabilize the ultrafine metal nanoparticles, but also prevent the aggregation of the graphene nanosheets. The synthetic strategy can be extended to other metals, such as Pd and Ru, for preparing robust catalysts for various reactions.

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