催化作用
氮氧化物
共沉淀
化学
选择性催化还原
氨
吸附
无机化学
氧化还原
路易斯酸
氧化物
兴奋剂
金属有机化学
氧气
化学工程
有机化学
材料科学
工程类
燃烧
光电子学
作者
Mingxuan Cai,Xue Bian,Feng Xie,Wenyuan Wu,Peng Cen
标识
DOI:10.1007/s10562-022-04017-z
摘要
A series of the CeO2–WO3/TiO2 catalysts doping polyethylene oxide (PEO) were synthesized by coprecipitation method and applied to selective catalytic reduction of NOx with NH3. The PEO doping catalysts showed better low-temperature activity, which demonstrated a prominent wide operation window ranging from 220 to 526 °C. A series of characterization methods were performed to demonstrate the influence of PEO addition on the internal structure, physical and chemical properties and catalytic reaction mechanism for the CeO2–WO3/TiO2 catalysts. More importantly, the addition of PEO could significantly modify and optimize the pore structure of catalysts, meanwhile, it was verified that the addition of PEO can enhance the content of Ce3+, adsorbed oxygen and the Brönsted and Lewis acid sites on the catalyst surface, thereby affecting the redox abilities, nitrogen oxides and ammonia adsorption capacity of catalysts.Graphical Abstract
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