Hierarchically porous nickel/carbon composite monoliths prepared by sol–gel method from an ionic precursor

• Kido, Yasuki

• 中西, 和樹

• Okumura, Nao

• Kanamori, Kazuyoshi

抄録

Utilizing a facile sol–gel reaction accompanied by phase separation, rigid monolithic nickel hydroxide-based xerogels and nickel/carbon composites with hierarchical porosity have been successfully fabricated. In the synthetic route starting from nickel chloride as a nickel precursor, trimethylene oxide acts as a gelation initiator to increase pH in a reaction solution. In addition, poly(acrylic acid) plays a double role as a phase separation inducer and as a co-constituent with nickel hydroxide to comprise continuous gel skeletons in the micrometer range. As a result, obtained xerogels possess well-defined macropores evidenced by microscopy observation and mercury porosimetry. Subsequent heat-treatment in air led to the crystallization of NiO at 300 °C, while calcination under argon flow brought about the formation of nickel/carbon (Ni/C) composites with hierarchical pores and large specific surface area at temperatures higher than 300 °C. This is the first report on the preparation of rigid monolithic xerogels and metal/carbon composite with well-defined macropores based on a metal salt precursor containing "divalent" cation.

収録刊行物

• Microporous and Mesoporous Materials

  Microporous and Mesoporous Materials 176 64-70, 2013-08

  Elsevier Inc

詳細情報

• CRID: 1050845760699913344
• NII論文ID: 120005244918
• ISSN: 13871811
• HANDLE: 2433/174074
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles