Hydrogen adsorption on high surface area Cr2O3 materials

Authors

  • Jinglian Fan,

    1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, P. R. China
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  • Yongxiang Cheng,

    1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, P. R. China
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  • Zunyun Xie,

    1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, P. R. China
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  • Lingyun Jin,

    1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, P. R. China
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  • Gengshen Hu,

    1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, P. R. China
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  • Jiqing Lu,

    1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, P. R. China
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  • Mengfei Luo,

    Corresponding author
    • Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, P. R. China
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  • Yuejuan Wang

    Corresponding author
    • Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, P. R. China
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Corresponding authors: e-mail mengfeiluo@zjnu.cn, znuwyj@zjnu.cn, Phone: +86 579 82283910, Fax: +86 579 82282595

Abstract

Amorphous Cr2O3 materials with high surface areas were prepared via a precipitation process with CrCl3 · 6H2O as the raw material, (NH4)2CO3, NH3 · H2O, and KOH as precipitating agents. Calcination of Cr(OH)3 precipitation at low temperatures (300–400 °C) resulted in amorphous Cr2O3 materials with high surface areas, while high-temperature calcination (500–600 °C) led to crystalline Cr2O3. The hydrogen-adsorption phenomenon was clearly observed in a hydrogen atmosphere on the amorphous Cr2O3 materials with high surface area. The adsorbed hydrogen desorbed at about 550 °C due to the phase transition from amorphous to crystalline. However, this phenomenon was not observed for crystalline Cr2O3.

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