Co3O4/CeO2 and Co3O4/CeO2–ZrO2 composite catalysts for methane combustion: Correlation between morphology reduction properties and catalytic activity
Co3O4/CeO2 and Co3O4/CeO2–ZrO2 composite catalysts for methane combustion: Correlation between morphology reduction properties and catalytic activity
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DOI：
10.1016/j.catcom.2005.02.006
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发表时间：
2005-05
影响因子：
3.7
通讯作者：
L. Liotta;G. Carlo;G. Pantaleo;G. Deganello
中科院分区：
文献类型：
--
作者：
L. Liotta;G. Carlo;G. Pantaleo;G. Deganello
采用柠檬酸盐共沉淀法和硝酸钴浸渍法制备了Co 3 O 4/CeO 2和Co 3 O 4/CeO 2-ZrO 2复合催化剂。将制备的材料和在750°C下老化7 h后的材料进行甲烷燃烧测试，并将催化性能与用作参考的商业Co 3 O 4的催化性能进行比较。采用柠檬酸盐法制备的Co_3O_4（30wt%）/CeO_2（70wt%）复合氧化物催化剂的甲烷起燃温度最低（T50=400°C），750°C焙烧7 h后，催化剂的活性没有明显降低。
Co3O4/CeO2and Co3O4/CeO2–ZrO2composite catalysts have been prepared by two different techniques, co-precipitation by citrate method and impregnation with cobalt nitrate of pre-formed ceria and ceria–zirconia oxides. The materials, as prepared and after ageing at 750°C 7h, were tested for methane combustion and the catalytic performances were compared with those of a commercial Co3O4, used as reference. A significant improvement of the activity was observed in the composite oxide Co3O4(30wt%)/CeO2(70wt%), prepared by citrate method, which exhibits the lowest light-off temperature of methane (T50=400°C) and does not suffer deactivation after calcination at 750°C 7h.