文献类型：期刊文献

中文题名：Pt-Ce掺杂对Cu/Al_2O_3催化剂结构及性能的影响及其用于苯催化氧化的研究

英文题名：Influence of Pt-Ce on Structure and Performance of Cu/Al_2O_3 and Its Application in Catalytic Oxidation of Benzene

作者：丁梦林[1];张思财[1];吕宁宁[1];左树锋[1]

机构：[1]绍兴文理学院应用化学研究所

年份：2013

卷号：31

期号：3

起止页码：289

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、、北大核心2011、Scopus、北大核心、CSCD、CSCD2013_2014

基金：国家自然科学基金(21203124);绍兴市科技局项目(2012B70023)资助

语种：中文

中文关键词：Cu;Al2O3;Pt—Ce;VOC;催化氧化;稀土

外文关键词：Cu/Al2O3 ; Pt-Ce ; VOC ; catalytic oxidation ; rare earths

中文摘要：通过添加Pt-Ce作为助剂,对Al2O3担载的Cu催化剂进行修饰,制备负载型催化剂用于苯的催化氧化。利用XRD,N2吸附和H2-TPR等手段对载体和催化剂的织构-结构、活性组分的分散、还原性能及活性组分之间的相互作用进行了表征和分析。结果表明:添加Pt与Ce有利于提高CuO颗粒在Al2O3表面上的分散度,使其晶粒变小,从而改善了催化剂的性能。部分活性组分进入到Al2O3孔道中,在孔中及表面均形成了活性氧化物种。添加微量的Pt(0.1%(质量分数))及Ce可明显提高Cu/Al2O3催化剂的氧化活性,其中0.1%Pt/10%CuCe(12∶1)/Al2O3在250℃下就能完全催化氧化苯,表现出最佳的催化活性,可与贵金属催化剂(通常负载量在0.3%～2.0%)的活性相媲美。催化剂的高活性主要是在于活性组分在Al2O3表面的高分散以及PtOx,CuO和CeO2之间的相互作用。

外文摘要：The Pt-Ce promoted Cu/Al2O3 catalysts were prepared and used for benzene complete oxida- tion. The catalysts were characterized by XRD, N2 ad- sorption and H2-TPR techniques to discuss texture- structure of the catalysts, the dispersion of active corn- ponents, redox properties and the interaction among the active components. The results showed that the addition of Pt and Ce promoted disp ticles and made crystal size of CuO ersion of CuO par- smaller, thus en- hanced the activity of the catalyst. Some active com-ponents entered into the pore of Al2O3 and formed ac- tive oxygen species on the surface and pore of Al2O3. Adding a small amount of Pt （0.1% ） and Ce could greatly improve 10% CuCe（ 12： oxidation of be the activity of CuAl2O3, and 0.1% Pt/ 1 ）/AlzO3 could catalyze the complete nzene at about 250 ℃, showing the highest catalytic activity which could be comparable with the activity of the noble metal catalyst （0.3 % 2.0% loadings us mainly attributed and and the strong Ce02. ually）. The high catalyst activity is to better dispersed CuO on Al2O3 interaction among PtOx, CuO and CeO2.