采用柠檬酸-溶胶凝胶法制得钙钛矿型复合氧化物La0.8Ce0.2 Mn1-xCuxO3(x=0.2,0.3,0.4),La0.8Sr0.2 Mn0.6 Cu0.4 O3,La0.8Ce0.1 Sr0.1Mn0.6Cu0.4O3,并采用X射线衍射(XRD)、扫描电镜(SEM)、比表面积(BET)、X射线光电子能谱(XPS)对其进行表征,测试了复合氧化物对CO+ NO的催化活性.结果表明:La0.8 Ce0.1 Sr0.1 Mn0.6Cu0.4 O3催化活性最好,150℃时CO转化率91.8％,300℃时NO转化率100％；对于La0.8Ce0.2 Mn1-xCuxO3(x =0.2,0.3,0.4),比表面积和颗粒的大小及分散度是影响催化活性的主要因素；对于La0.8 Ce0.2 Mn0.6 Cu0.4 O3,La0.8Sr0.2Mn0.6 Cu0.4O3,La0.8Ce0.1Sr0.1 Mn0.6Cu0.4O3,催化剂的组成是影响催化活性的关键因素.
参考文献
| [1] | Kaspar J;Fornasiero P;Graziani M .Use of CeO2-based oxides in the three-way catalysis[J].Catalysis Today,1999,50(02):285. |
| [2] | Zhu J J;Ame Thomas .Perovskite-type mixed oxides as catalytic material for NO removal[J].Applied Catalysis B:Environmental,2009,92(3-4):225. |
| [3] | Raj S.;Raychaudhury P.;Nigam AK.;Pinto R.;Polasik M. Pawlowski F.;Basa DK.;Padhi HC. .Valence electronic structure of Mn in undoped and doped lanthanum manganites from relative K X-ray intensity studies[J].Nuclear Instruments and Methods in Physics Research, Section B. Beam Interactions with Materials and Atoms,2001(3):344-350. |
| [4] | Dai H X;He H;Li P H .The relationship of structural defectredox property-catalytic performance of perovskites and their related compounds for CO and NOx removal[J].Catalysis Today,2004,90(03):231. |
| [5] | BULGAN G.,梁淑惠,滕飞,姚文清,朱永法.Ce掺杂对La1-xCexCoO3催化剂的结构和催化氧化性能的影响[J].物理化学学报,2008(02):205-210. |
| [6] | Belessi V C;Bakasb T V;Costa C N .Synergistic effects of crystal phases and mixed valences in La-Sr-Ce-Fe-O mixed oxidic/perovskitic solids on their catalytic activity for the NO +CO reaction[J].Applied Catalysis B:Environmental,2000,28:13. |
| [7] | Belessi V C;Costa C N;Bakasb T V .Catalytic behavior of LaSr-Ce-Fe-O mixed oxidic/per ovskitic systems for the NO + CO and NO + CH4 + O2 (lean-NOx) reactions[J].Catalysis Today,2000,59:347. |
| [8] | Giannakas AE;Leontiou AA;Ladavos AK;Pomonis PJ .Characterization and catalytic investigation of NO plus CO reaction on perovskites of the general formula LaxM1-xFeO3 (M = Sr and/or Ce) prepared via a reverse micelles microemulsion route[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2006(2):254-262. |
| [9] | Teraoka Y.;Kagawa S.;Jansson K.;Nygren M.;Nii H. .Influence of the simultaneous substitution of Cu and Ru in the perovskite-type (La,Sr)MO3 (M=Al, Mn, Fe, Co) on the catalytic activity for CO oxidation and CO-NO reactions[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2000(Special Issue SI):35-41. |
| [10] | 彭小圣,林赫,上官文峰,黄震.K和Cu部分取代对LaMnO3钙钛矿型催化剂同时去除Nox和碳烟的影响[J].催化学报,2006(09):767-771. |
| [11] | He H;Liu M;Dai H X;Qiu W G,Zi X H .An investigation of NO/CO reaction over perovskite-type oxide Lao.s Ce0.2 Bo.4 Mn0.6O3(B =Cu or Ag) catalysts synthesized by reverse microemulsion[J].Catalysis Today,2007,126:290. |
| [12] | Hu Y H;Dong L;Shen M M .Influence of supports on the activities of copper oxide species in the low-temperature NO + CO reaction[J].Applied Catalysis B:Environmental,2001,31:61. |
| [13] | Zhu JJ;Zhao Z;Xiao DH;Li J;Yang XG;Wu Y .Study of La2-xSrxCuO4 (x=0.0, 0.5, 1.0) catalysts for NO plus CO reaction from the measurements of O-2-TPD, H-2-TPR and cyclic voltammetry[J].Journal of molecular catalysis, A. Chemical,2005(1/2):35-40. |
| [14] | Runduo Zhang;Houshang Alamdari;Serge Kaliaguine .Fe-based perovskites substituted by copper and palladium for NO + CO reaction[J].Journal of Catalysis,2006(2):241-253. |
| [15] | 萨仁图雅,胡瑞生,白雅琴.稀土A-Ce-O催化剂的合成及性能研究[J].中国稀土学报,2006(z2):58-61. |
| [16] | 李丽.汽车尾气净化催化剂铁基稀土钙钛矿的结构和性能研究[M].黑龙江:黑龙江大学出版社,2007 |
| [17] | 于亚莉;张瑞峰;刘社田;于作龙 .LaMn1-xCoxO3催化剂的XPS研究[J].中国稀土学报,1992,10(02):134. |
| [18] | 戴红兴;何洪;李佩珩;孙继红,訾学红 .稀土钙钛矿型氧化物上CO低温氧化性能研究[J].中国稀土学报,2004,22(01):22. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%