文献类型：期刊文献

中文题名：添加铈对锰基催化剂的织构-结构及其氧化还原性能的影响

英文题名：Influence of Cerium on Texture-Structure and Redox Properties of Manganese Based Catalysts

作者：杨卜源[1];佟丽华[1];左树锋[2];齐陈泽[2]

机构：[1]佳木斯大学药学院;[2]绍兴文理学院化学化工学院应用化学研究所

年份：2011

卷号：29

期号：4

起止页码：433

中文期刊名：中国稀土学报

外文期刊名：Journal of the Chinese Society of Rare Earths

收录：CSTPCD、、Scopus、CSCD2011_2012、北大核心2008、北大核心、CSCD

基金：绍兴文理学院引进人才科研启动金资助项目(20095019)

语种：中文

中文关键词：织构-结构;氧化还原性能;Mn基催化剂;VOC;稀土

外文关键词：texture-structure; redox properties; Mn based catalyst; VOC; rare earths

中文摘要：考察了添加稀土Ce对Mn/γ-Al2O3催化剂的织构-结构、表面活性组分的分布及氧化还原性能的影响,以催化燃烧易挥发有机污染物(VOCs)苯为探针反应研究了Ce对Mn基催化剂催化性能的影响。采用传统的浸渍法制备了系列催化剂,利用粉末X射线衍射(XRD),N2吸脱附程序升温还原(TPR)等手段对催化剂进行了表征分析。结果表明,添加稀土使Mn基催化剂比表面积、孔体积减小,说明部分Ce进入孔道中,形成了更多的氧化还原活性位,并且进一步研究得知,适量Ce的添加可以促进催化剂活性位的自组装,达到理想的催化氧化性能。添加Ce后,催化剂的活性组分中高价Mn的含量明显增加,这些都有利于提高催化剂的氧化性能。活性实验结果表明,添加适量Ce优化了催化剂的织构-结构、表面活性组分及氧化还原性能,因此催化剂的活性和稳定性明显提高,其中以MnCe为1∶1时,活性最佳,280℃左右就能完全转化苯。

外文摘要：Influence of adding Ce on the texture-structure,distribution of surface active components and redox properties of Mn/γ-Al2O3 catalysts was studied.As a probe reaction,benzene deep oxidation was chosen to investigate the effect of Ce on the catalytic oxidation of Mn based catalysts.The catalysts were prepared by traditional impregnation method and characterized by XRD,N2 adsorption/desorption and H2-TPR techniques.The results showed that doping Ce resulted in a decrease in surface area and pore volume,and it was proved that some Ce cations entered into the pore of Al2O3 and thus formed more redox sites.And further study indicated that adding appropriate amount of Ce could promote the self-assembly of catalysts,which improved the oxidation capability of the catalysts.The activity tests of deep oxidation of benzene showed that adding Ce optimized the texture-structure,distribution of surface active components and redox properties of the catalysts,as a result,obviously enhanced the catalytic activity and stability of the catalysts.Especially for MnCe（1∶1） catalyst,the temperature of complete oxidation was about 280 ℃,exhibiting the highest catalytic activity.