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Bimetallic Au–Ni Nanoparticles Embedded in SiO2 Nanospheres: Synergetic Catalysis in Hydrolytic Dehydrogenation of Ammonia Borane

  1. Hai-Long Jiang Dr.1,3,
  2. Tetsuo Umegaki Dr.1,
  3. Tomoki Akita Dr.1,3,
  4. Xin-Bo Zhang Dr.1,
  5. Masatake Haruta Prof. Dr.2,3,
  6. Qiang Xu Prof. Dr.1,3

Article first published online: 1 FEB 2010

DOI: 10.1002/chem.200902829

Issue

Chemistry - A European Journal

Chemistry - A European Journal

Volume 16, Issue 10, pages 3132–3137, March 8, 2010

Additional Information

How to Cite

Jiang, H.-L., Umegaki, T., Akita, T., Zhang, X.-B., Haruta, M. and Xu, Q. (2010), Bimetallic Au–Ni Nanoparticles Embedded in SiO2 Nanospheres: Synergetic Catalysis in Hydrolytic Dehydrogenation of Ammonia Borane. Chem. Eur. J., 16: 3132–3137. doi: 10.1002/chem.200902829

Author Information

  1. 1

    National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577 (Japan), Fax: (+81) 72-751-7942

  2. 2

    Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397 (Japan)

  3. 3

    CREST, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012 (Japan)

Publication History

  1. Issue published online: 1 MAR 2010
  2. Article first published online: 1 FEB 2010
  3. Manuscript Received: 14 OCT 2009

Funded by

  • AIST
  • JST

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Keywords:

  • dehydrogenation;
  • gold;
  • heterogeneous catalysis;
  • nanoparticles;
  • nickel

Abstract

Gold–nickel nanoparticles (NPs) of 3–4 nm diameter embedded in silica nanospheres of around 15 nm have been prepared by using [Au(en)2Cl3] and [Ni(NH3)6Cl2] as precursors in a NP-5/cyclohexane reversed-micelle system, and by in situ reduction in an aqueous solution of NaBH4/NH3BH3. Compared with monometallic Au@SiO2 and Ni@SiO2, the as-synthesized Au–Ni@SiO2 catalyst shows higher catalytic activity and better durability in the hydrolysis of ammonia borane, generating a nearly stoichiometric amount of hydrogen. During the generation of H2, the synergy effect between gold and nickel is apparent: The nickel species stabilizes the gold NPs and the existence of gold helps to improve the catalytic activity and durability of the nickel NPs.

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