Catalytic Reduction of NO by CO over LaMn1-xFexO3 and La0.8A0.2Mn0.3Fe0.7O3 (A = Sr, Cs, Ba, Ce) Perovskite Catalysts

被引:37
|
作者
Tarjomannejad, Ali [1 ]
Farzi, Ali [1 ]
Gomez, Maria Jose Illan [2 ]
Niaei, Aligholi [1 ]
Salari, Dariush [3 ]
Albaladejo-Fuentes, Vicente [2 ]
机构
[1] Univ Tabriz, Dept Chem & Petr Engn, Catalyst & Reactor Res Grp, Tabriz, Iran
[2] Univ Alicante, Dept Inorgan Chem, Carbon Mat & Environm Res Grp, Fac Sci, Alicante, Spain
[3] Univ Tabriz, Dept Appl Chem, Fac Chem, Tabriz, Iran
基金
美国国家科学基金会;
关键词
Perovskite; Sol-Gel; Catalytic reduction; NO; CO; PLUS CO; OXIDATION; OXIDES; MN; CU; PERFORMANCE; TOLUENE; FE; SUBSTITUTION; LACO1-XCUXO3;
D O I
10.1007/s10562-016-1860-0
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this study, LaMn1-xFexO3 (x = 0, 0.3, 0.5, 0.7, 1) and La(0.8)A(0.2)Fe(0.7)Mn(0.3)O(3) (A = Sr, Cs, Ba, Ce) perovskite oxides were synthesized by sol-gel method and their activities were evaluated in catalytic reduction of NO by CO. Perovskite catalysts were characterized by XRD, BET, H-2-TPR, XPS and SEM. Synthesized perovskites present a high activity for the catalytic reduction of NO by CO, LaMn0.3Fe0.7O3 Show the highest activity among LaMn1-xFexO3 perovskite catalysts (71 % CO conversion and 82 % NO conversion at 350 A degrees C). The effect of partial substitution of Sr, Cs, Ba and Ce in A-site was also examined on the structure and catalytic activity of LaMn0.3Fe0.7O3 perovskite catalyst. La0.8Sr0.2Fe0.7Mn0.3O3 and La0.8Ce0.2Fe0.7Mn0.3O3 present the highest activities among La(0.8)A(0.2)Fe(0.7)Mn(0.3)O(3) perovskites. The introduction of Sr2+ and Ce4+ in A-site of perovskite change the reducibility of B-site cations and Fe4+/Fe3+ and Mn4+/Mn3+ ratios, and increase O-ads/O-latt ratio and these factors create structural defects in perovskite which lead to higher catalytic activities.
引用
收藏
页码:2330 / 2340
页数:11
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