Hydrothermal stability of mesoporous Ni-doped γ-Al2O3

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  • NAGANO Takayuki
    Environmental Material Department, Materials Research and Development Laboratory, Japan Fine Ceramics Center
  • SATO Koji
    Environmental Material Department, Materials Research and Development Laboratory, Japan Fine Ceramics Center
  • SAITOH Tomohiro
    Nanoscopy & Simulation Department, Nanostructures Research Laboratory, Japan Fine Ceramics Center
  • TAKAHASHI Seiji
    Environmental Material Department, Materials Research and Development Laboratory, Japan Fine Ceramics Center

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タイトル別名
  • Hydrothermal stability of mesoporous Ni-doped .GAMMA.-Al2O3
  • Hydrothermal stability of mesoporous Ni doped g Al2O3

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Ni-doped γ-Al2O3 with different molar compositions has been synthesized on α-Al2O3 porous supports by the sol-gel method using nitrate-alkoxide precursors. The increasing of lattice constants by Ni doping showed the formation of uniform solid solution. When the Ni content increased up to 10 mol%, NiO phase was formed. The relationship between molar compositions and hydrothermal stability under atmosphere of steam/N2 = 3 at 773 K for 0-50 h was compared. The pore size distribution of 5 mol% Ni-doped γ-Al2O3 on α-Al2O3 porous support was stable even after hydrothermal exposure at 773 K for 50 h.

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