Synthesis and Application of Ni-M@Silica Yolk-Shell Nanostructures as Versatile Catalytic Materials

Abstract:

Recent developments in nanochemistry offer precise morphology control of nanomaterials, which has significant impacts in the field of heterogeneous catalysis. Rational design of bifunctional catalysts can influence various aspects of catalytic properties. In the present work, a new type of Ni-M(Co, Zr, Ce)@SiO₂ yolk-shell nanoreactor framework comprising Ni-M cores inside hollow silica shells has been prepared through direct silica coating. The Ni-M@SiO₂ nanoreactor structure is employed as a model catalyst for the partial oxidation of methane reaction. The Ni/ZrO₂@SiO₂ catalyst proved to be more active and possessed less carbon deposition reduced effectively by movable lattice oxygen. This nanoreactor framework is remarkably stable at high temperatures up to 750 °C, because the silica hollow shells around the cores essentially block particle sintering. The catalyst exhibited a continuous conversion rate of methane and significantly enhanced stability at high temperatures.

• Periodical: Materials Science Forum (Volume 852)
• Pages: 323-328
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.852.323
• Online since: April 2016
• Authors: Gang Gang Ai, Chuan Min Ding, Ya Long Wen, Yan Ming Jia, Jun Wen Wang, Lei Fan, Kan Zhang, Ping Liu
• Keywords: Carbon Deposition, Partial Oxidation of Methane, Sintering, Yolk-Shell Nanostructures

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