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化学学报
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化学学报 ›› 2012, Vol. 0 ›› Issue (04): 385-391.DOI: 10.6023/A1109181    下一篇

研究论文

介孔MgAl2O4 涂层整体式氢气燃烧催化剂的制备与表征

张存满a,b, 张靖a,b, 宫振华b, 马建新a,b   

  1. a 同济大学汽车学院 上海 201804;
    b 同济大学新能源汽车工程中心 上海 201804
  • 投稿日期:2011-09-18 修回日期:2011-11-07 发布日期:2011-12-22
  • 通讯作者: 张存满, 马建新
  • 基金资助:

    国家高技术研究与发展技术(No. 2006AA11A187)资助项目.

Synthesis and Characterization of H2 Combustion Monolithic Catalyst Based on Mesoporous MgAl2O4 Spinel Coating

Zhang Cunmana,b, Zhang Jinga,b, Gong Zhenhuab, Ma Jianxina,b   

  1. a School of Automotive Studies, Tongji University, Shanghai 201804;
    b Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804
  • Received:2011-09-18 Revised:2011-11-07 Published:2011-12-22
  • Supported by:

    Project supported by the National High Technology Research and Development Program (No. 2006AA11A187).

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以广义酸-碱对理论为依据, 报道了一种仅利用纯无机碱和盐为原料在蜂窝陶瓷载体上制备介孔MgAl2O4 涂层的方法, 并通过原位酸碱反应对涂层进行CexZr1-xO2 修饰和Pt 的负载, 成功制备出具有高催化活性的整体式氢气燃烧催化剂. 通过扫描电子显微镜(SEM), X 射线衍射仪(XRD)以及N2吸/脱附分析仪表征了催化剂的微观结构. 结果表明复合涂层不仅具有均匀的微晶结构, 而且具有高的比表面积(>250 m2·g-1)和大的孔容(0.32 cm3·g-1). 氢气催化燃烧反应结果显示, 制备的整体式催化剂具有很高的催化活性, 可以在室温下快速起燃, 并且氢气的初始转化率达到95%以上.

关键词: 氢气催化燃烧, 整体式催化剂, 酸-碱理论, MgAl2O4, 铈锆固溶体

A novel method to prepare mesoporous MgAl2O4 coating on the honeycomb cordierite ceramics from only inorganic salt and alkali by the generalized Lewis acid-base theory was reported. The Pt-based monolithic catalysts were prepared successfully after CexZr1-xO2 modified and Pt loaded by in-situ acid-alkali reaction. The samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), and N2-sorption. The results showed that the coating had uniform microcrystal structure as well as high surface area (>250 m2穏-1) and large pore volume (0.32 cm3穏-1). The investigations of H2 catalytic combustion showed these monolithic catalysts could fastly start up even at room temperature, and H2 initial conversion could reach more than 95%.

Key words: hydrogen catalytic combustion, monolithic catalyst, acid-alkali theory, porous MgAl2O4, ceria-zirconia solid solution