LaMn_(1-x)Cu_xO_(3±δ) perovskite oxides (x = 0, 0.2, 0.4, 0.6, 0.8, 1) were prepared by two different methods, the Pechini and sol-gel methods. The catalysts were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray fluorescence spectroscopy, N_2 adsorption, and temperature-programmed reduction. Their catalytic activity in the oxidation of methane and CO was evaluated. EDS and SEM results showed that the Pechini samples had more homogeneity and smaller particles (higher specific surface area). The catalytic activity for methane combustion was highest for x = 0.2. In CO oxidation, the oxides with x = 0.2 and x = 0.4 were the most active. The Pechini samples had higher activity and stability than the sol-gel samples.
LaMn_(1-x)Cu_xO_(3±δ) perovskite oxides (x = 0, 0.2, 0.4, 0.6, 0.8, 1) were prepared by two different methods, the Pechini and sol-gel methods. The catalysts were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray fluorescence spectroscopy, N_2 adsorption, and temperature-programmed reduction. Their catalytic activity in the oxidation of methane and CO was evaluated. EDS and SEM results showed that the Pechini samples had more homogeneity and smaller particles (higher specific surface area). The catalytic activity for methane combustion was highest for x = 0.2. In CO oxidation, the oxides with x = 0.2 and x = 0.4 were the most active. The Pechini samples had higher activity and stability than the sol-gel samples.
参考文献
| [1] | Ordonez S;Paredes J R;Diez F V .[J].Applied Catalysis A:General,2008,341:174. |
| [2] | Cimino S;Benedetto A D;Pirone R;Russo G .[J].Catalysis Today,2003,83:33. |
| [3] | Spinicci R;Delmastro A;Ronchetti S;Tofanari A .[J].Materials Chemistry and Physics,2002,78:393. |
| [4] | Cimino S;Colonna S;Rossi S D;Faticanti M Lisi L Pettiti I Porta P .[J].Journal of Catalysis,2002,205:309. |
| [5] | Lampert J K;Kazi M S;Farrauto R J .[J].Applied Catalysis B:Environmental,1997,14:211. |
| [6] | Campagnoli E;Tavares A;Fabbrini L;Rossetti I;Dubitsky YA;Zaopo A;Forni L .Effect of preparation method on activity and stability of LaMnO3 and LaCoO3 catalysts for the flameless combustion of methane[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2005(2):133-139. |
| [7] | Svensson E E;Nassos S;Boutonnet M;Jaras S G .[J].Catalysis Today,2006,117:484. |
| [8] | He H;Liu M;Dai H;Qiu W Zi X .[J].Catalysis Today,2007,126:290. |
| [9] | Liu Y;Zheng H;Liu J;Zhang T .[J].Chemical Engineering Journal,2002,89:213. |
| [10] | Kucharczyk B;Tylus W .[J].Applied Catalysis A:General,2008,335:28. |
| [11] | Cimino S;Lisi L;Rossi S D;Faticanti M Porta P .[J].Applied Catalysis B:Environmental,2003,43:397. |
| [12] | 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. |
| [13] | Zhang R;Llanueva A;Alasdair H;Kaliaguine S .[J].Journal of Molecular Catalysis A:Chemical,2006,258:22. |
| [14] | Pecchi G;Campos C;Pena O .[J].Materials Research Bulletin,2009,44:846. |
| [15] | Kakihan M;Arim M;Yoshimur M;Ikeda N Sugitani Y .[J].Journal of Alloys and Compounds,1999,283:102. |
| [16] | Alicante M;Kirchnerova J;Delmon B .[J].Applied Catalysis A:General,2003,245:231. |
| [17] | Popa M.;Van Hong L.;Kakihana M. .Particle morphology characterization and magnetic properties of LaMnO3+d perovskites[J].Physica, B. Condensed Matter,2003(2/4):237-240. |
| [18] | Tietz F;Schmidt A;Zahid M .[J].Journal of Solid State Chemistry,2004,177:745. |
| [19] | Ran R;Wu X;Weng D .[J].Journal of Alloys and Compounds,2006,414:169. |
| [20] | Taguchi H;Yamasaki S;Itadani A;Yosinaga M Hirota K .[J].Catalysis Communications,2008,9:1913. |
| [21] | Porta P;Rossi S D;Faticanti M;Minelli G,Pettiti I,Lisi L,Turco M .[J].Journal of Solid State Chemistry,1999,146:291. |
| [22] | Lisi L;Bagnasco G;Ciambelli P;Rossi S D Porta P Russo G Turco M .[J].Journal of Solid State Chemistry,1999,146:176. |
| [23] | Zhang R;Villanueva A;Alamdari H;Kaliaguine S .[J].Applied Catalysis A:General,2006,307:85. |
| [24] | Tabata K;Hirano Y;Suzuki E .[J].Applied Catalysis A:General,1998,170:245. |
| [25] | Yang W D;Chang Y H;Huang S H .[J].Journal of the European Ceramic Society,2005,25:3611. |
| [26] | Worayingyong A;Kangvansura P;Ausadasuk S;Praserthdam P .The effect of preparation: Pechini and Schiff base methods, on adsorbed oxygen of LaCoO3 perovskite oxidation catalysts[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2008(1/3):217-225. |
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