| 介孔MgAl2O4涂层整体式氢气燃烧催化剂的制备与表征 |
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| 引用本文： | 张存满,张靖,宫振华,马建新.介孔MgAl2O4涂层整体式氢气燃烧催化剂的制备与表征[J].化学学报,2012(4):385-391. |
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| 作者姓名： | 张存满 张靖 宫振华 马建新 |
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| 作者单位： | 同济大学汽车学院;同济大学新能源汽车工程中心 |
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| 基金项目： | 国家高技术研究与发展技术(No.2006AA11A187)资助项目~~ |
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| 摘 要： | 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(>250m2·g-1)和大的孔容(0.32cm3·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.
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| 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 |
Synthesis and Characterization of H2 Combustion Monolithic Catalyst Based on Mesoporous MgAl2O4 Spinel Coating |
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| Institution: | Zhang,Cunman,a,b Zhang,Jinga,b Gong,Zhenhuab Ma,Jianxin,a,b(a School of Automotive Studies,Tongji University,Shanghai 201804)(b Clean Energy Automotive Engineering Center,Tongji University,Shanghai 201804) |
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| Abstract: | 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 diffrac-tion(XRD),and N2-sorption.The results showed that the coating had uniform microcrystal structure as well as high surface area(>250 m2og-1) and large pore volume(0.32 cm3og-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%. |
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| Keywords: | hydrogen catalytic combustion monolithic catalyst acid-alkali theory porous MgAl2O4 ceria-zirconia solid solution |
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