Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (07): 1707-1711.doi: 10.3866/PKU.WHXB20110622

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Synthesis and Cyclic Hydrogenation Properties of Magnesium Ultrafine Nanoparticles Prepared by Acetylene Plasma

ZHANG Xuan-Zhou1,2, YANG Jun-Zhi2, SONG Ping2, TIAN Wen-Huai1, LI Xing-Guo2   

  1. 1. Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, P. R. China;
    2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2011-03-09 Revised:2011-04-05 Published:2011-06-28
  • Contact: TIAN Wen-Huai, LI Xing-Guo E-mail:wenhuaitian@sina.com; xgli@pku.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20971009, 20821091, 51071003) and National Key Basic Research Program of China (973) (2009CB939902, 2010CB631301).

Abstract:

Ultrafine Mg nanoparticles of around 40 nm in size were prepared by an acetylene plasma metal reaction, which is a revised approach of the traditional hydrogen plasma metal reaction. The morphology and the cyclic hydrogenation properties were investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD), specific surface area (BET) tests, and the kinetics of hydrogenation and dehydrogenation. Because of the short diffusion distance and the large specific surface area, the kinetics of hydrogenation and dehydrogenation of the small Mg nanoparticles improved. The nanostructured carbon cover on the Mg nanoparticles decreased the amount of Mg nanoparticle oxidation and also prevented the growth of Mg nanoparticles during the hydrogenation and dehydrogenation process. Therefore, the Mg ultrafine nanoparticles exhibited excellent cycling stability. Cycling tests showed little loss in hydrogen storage capacity after 30 cycles.

Key words: Magnesium, Nanoparticle, Hydrogen storage material, Acetylene plasma, Cyclic property

MSC2000: 

  • O646