Well-dispersed gallium-promoted sulfated zirconia on mesoporous MCM-41 silica

Wei Wang, Chang Lin Chen, Nan Ping Xu, Song Han, Tao Li, Soofin Cheng, Chung Yuan Mou

研究成果: 雜誌貢獻文章同行評審

17 引文 斯高帕斯(Scopus)


Gallium-promoted sulfated zirconia (SZ) was confined inside pure-silica MCM-41 (abbreviated as SZGa/MCM-41), where the latter served as a host material. It was prepared by direct dispersion of metal sulfate in the as-synthesized MCM-41 materials, followed by thermal decomposition. The SZGa/MCM-41 catalysts were characterized by XRD, N2 adsorption, HRTEM, DRIFT, NH3-TPD, and TPR. The experimental results showed that the ordered porous host structure was still maintained in the catalyst. SZ was in meta-stable tetragonal phase and highly dispersed on the interior surface of MCM-41 even at a high loading of 50wt%. Additionally, a small fraction of SZ nanoparticles on the external surface of MCM-41 was obtained. The catalytic activity of SZGa/MCM-41 was examined in n-butane isomerization. In comparison to SZ/MCM-41 without promoter, the catalytic activities of the Ga-promoted catalysts were greatly improved. The reason proposed for the higher activity of the Ga-promoted catalysts was that Ga enhances the oxidizing ability of the catalysts.

頁(從 - 到)281-285
期刊Catalysis Letters
出版狀態已發佈 - 11月 2002

ASJC Scopus subject areas

  • 催化
  • 化學 (全部)


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