催化作用
氧化还原
钙钛矿(结构)
介孔材料
氧气
无机化学
材料科学
化学
结晶学
生物化学
有机化学
作者
Wei Cui,Huawei Chen,Qing Liu,Mifen Cui,Xian Chen,Zhaoyang Fei,J.C. Huang,Zuliang Tao,Minghong Wang,Xu Qiao
标识
DOI:10.1002/slct.202002076
摘要
Abstract In this study, highly‐dispersed perovskite‐type oxides LaMn x Co 1‐x O 3 supported on mesoporous SiO 2 (LM x C 1‐x O/SiO 2 ) were synthesized by a citric acid‐assisted deposition method. For LM x C 1‐x O/SiO 2 catalysts, the double B‐site transition metal ions can not only significantly arise the surface defects, but also lead to the formation of (Mn 3+ +Co 3+ )/(Co 2+ +Mn 4+ ) redox cycle, both of which were able to improve the catalytic performance of LM x C 1‐x O/SiO 2 in n‐butylamine combustion. Strikingly, LM 0.2 C 0.8 O/SiO 2 catalyst showed the optimum catalytic performance (T 90% =210 °C at a space velocity of 15,000 mL g cat −1 h −1 ) and the lowest NO x yield among the LM x C 1‐x O/SiO 2 samples, which could be greatly assigned to the accelerated activation and circulation of the oxygen species initiated by the surface defects and redox cycle.
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