烟灰
氮氧化物
柴油机排气
柴油机
催化作用
钙钛矿(结构)
材料科学
兴奋剂
金属
柴油
废气
化学工程
微粒
柴油颗粒过滤器
柴油废气油液
无机化学
化学
燃烧
汽车工程
冶金
有机化学
光电子学
工程类
作者
Gang Zhou,Jinhao Zhang,Mengjie Zhang,Chao Wang,Hui Zhou,Yongliang Zhang
标识
DOI:10.1016/j.joei.2024.101560
摘要
The synchronous removal of soot particles and NOx using high-performance catalysts is a research hotspot in the catalytic purification of diesel engine exhaust. In this paper, glucose is used as a complexing agent to successfully prepare a series of praseodymium and/or potassium doped La–Ni-based perovskite catalysts. The La0.9Pr0.05K0.05NiO3 catalyst exhibits the best catalytic performance when NO2 is present in the environment, with values of T10, T50, and T90 at 287, 331, and 361 °C, respectively. The CO2 selectivity reaches over 98% and has good thermal stability. Through characterization experiments, it was found that the co-doping of Pr and K can lead to the formation of oxygen vacancies by changing the valence state of Ni atoms, thereby increasing the adsorption and activation centers of reactive oxygen species, and enhancing the oxygen storage capacity of the catalyst through the redox cycle between Pr3+ and Pr4+.
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