Pt掺杂对Cu-Mn-Ce复合氧化物催化燃烧性能的影响

摘要

In order to improve catalytic combustion performance and thermal stability of Cu-Mn-Ce mixed oxides, a series of Pt-doped Cu-Mn-Ce catalysts were synthesized by the sol-gel method, and characterized by XRD, BET, H2-TPR, Raman. Their catalytic combustion activities of toluene were tested for the catalytic combustion of toluene. The results indicated that there appear many crystalline defects in the structure of Pt-doped catalysts, which would be favorable for increase of surface area and surface oxygen,leading to better oxidation-reduction ability of catalysts. The activity tests showed that addition of Pt can improve significantly catalytic combustion activity and thermal stability of the mixed oxide catalysts.%为提高复合氧化物催化剂的催化燃烧性能和热稳定性,采用溶胶-凝胶法制备一系列贵金属Pt改性的Cu-Mn-Ce催化剂,采用XRD、BET、H2-TPR、Raman对催化剂进行了表征,并以甲苯催化燃烧为模型反应考察了催化活性.结果表明,Pt掺杂会导致Cu-Mn-Ce晶相结构中出现较多的缺陷位,并使比表面积和表面氧数量增加,增强了催化剂的氧化一还原能力.活性测试表明,Pt掺杂可以提高催化剂对甲苯的催化燃烧活性和热稳定性.