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<p>Crystalline MoVTe(Sb)NbO oxide catalysts have been shown to exhibit high oxidation catalytic performance in propane ammoxidation. However, the roles of individual elements remain unclear. In order to elucidate these elemental roles, Nb and Te were introduced into the orthorhombic Mo<sub>3</sub>VO<sub>x</sub> oxide (Orth-MoVO) through post-hydrothermal treatment. Structural analysis revealed that Nb covers the surface of the Orth-MoVO crystal particles, while Te is accommodated within the hexagonal channel of the orthorhombic structure. Physicochemical characterization demonstrated that Nb enhance the structural stability of the orthorhombic phase, and the introduction of Te into amorphous Mo<sub>3</sub>VO<sub>x</sub> oxide through post-hydrothermal treatment facilitated crystallization from the amorphous phase to the orthorhombic structure during heat treatment. These findings provide novel insights into the roles of individual elements in Mo-V-Te(Sb)-Nb oxide catalysts.</p>

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Post-hydrothermal Treatment of Mo3VOx Catalysts: Roles of Nb and Te in Structural Transformation and Oxidation Ability

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • Kosuke Shimoda,
  • Satoshi Ishikawa,
  • Wataru Ueda

摘要

Crystalline MoVTe(Sb)NbO oxide catalysts have been shown to exhibit high oxidation catalytic performance in propane ammoxidation. However, the roles of individual elements remain unclear. In order to elucidate these elemental roles, Nb and Te were introduced into the orthorhombic Mo3VOx oxide (Orth-MoVO) through post-hydrothermal treatment. Structural analysis revealed that Nb covers the surface of the Orth-MoVO crystal particles, while Te is accommodated within the hexagonal channel of the orthorhombic structure. Physicochemical characterization demonstrated that Nb enhance the structural stability of the orthorhombic phase, and the introduction of Te into amorphous Mo3VOx oxide through post-hydrothermal treatment facilitated crystallization from the amorphous phase to the orthorhombic structure during heat treatment. These findings provide novel insights into the roles of individual elements in Mo-V-Te(Sb)-Nb oxide catalysts.