A urea-nitrate combustion method was used to prepare Ce-Mn-O material, which was applied as the support for a series of CuO/Ce-Mn-O catalysts. The structure of the catalysts was characterized with N2 adsorption/desorption, X-ray diffraction (XRD), temperature-programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS). The catalytic activity of the catalysts for the oxidation of CO was evaluated on a conventional fixed-bed quartz reactor. XRD results showed that the synergetic effect between manganese and cerium led to a little higher electron density of Ce3+ in the mixed oxides. When the CuO content was lower than 5 wt.%, Cu species were well dispersed onto the Ce-Mn-O support or/and they formed a solid solution with CeO2 (inside the fluorite lattice). At higher CuO content (CuO>5 wt.%), large CuO particles were observed. There was strong interaction among ceria, man-ganese and copper oxide because of the doping of Mn. This interplay changed the reducibility and the valence states of the compo-nents, leading to the improved activity of the CuO/Ce-Mn-O catalysts.
参考文献
| [1] | Gómez L E;Tiscornia I S;Boix A V;Miró E E .Co/ZrO2 catalysts coated on cordierite monoliths for CO preferen-tial oxidation[J].Appl.Catal., A,2011,401:124. |
| [2] | Qiao, D.;Lu, G.;Liu, X.;Wang, Y.;Guo, Y. .Preparation of Ce_(1-x) Fe _x O_2 solid solution and its catalytic performance for oxidation of CH_4 and CO[J].Journal of Materials Science,2011(10):3500-3506. |
| [3] | Varghese S;Cutrufello M G;Rombi E;Cannas C, Monaci R, Ferino I .CO oxidation and preferential oxidation of CO in the presence of hydrogen over SBA-15-templated CuO-Co3O4 catalysts[J].Appl. Catal., A,2012,443-444:161. |
| [4] | Morales M R;Agüero F N;Cadus L E .Catalytic combus-tion of n-Hexane over alumina supported Mn-Cu-Ce cata-lysts[J].Catalysis Letters,2013,143:1003. |
| [5] | Wang L H;Liu H;Liu Y;Chen Y, Yang S Q .Effect of precipitants on Ni-CeO2 catalysts prepared by a co-pre-cipitation[J].Journal of Rare Earths,2013,31:969. |
| [6] | Gao R H;Zhang D S;Maitarad P;Shi L Y, Rungrotmong-kol T, Li H R, Zhang J P, Cao W G .Morphol-ogy-dependent properties of MnOx/ZrO2-CeO2 nanostruc-tures for the selective catalytic reduction of NO with NH3[J].J.Phys.Chem.C,2013,117:10502. |
| [7] | Li Y;Wei Z H;Sun J M;Gao F, Peden C H F, Wang Y .Effect of sodium on the catalytic properties of VOx/CeO2 catalysts for oxidative dehydrogenation of methanol[J].J.Phys.Chem.C,2013,117:5722. |
| [8] | Galvita V V;Filez M;Poelman H;Bliznuk V, Marin G B .The role of different types of CuO in CuO-CeO2/Al2O3 for total oxidation[J].Catalysis Letters,2013,144:32. |
| [9] | Shinde V M;Madras G .Synthesis of nanosized Ce0.85M0.1Ru0.05O2-δ(M=Si, Fe)solid solution exhibiting high CO oxidation and water gas shift activity[J].Appl. Ca-tal., B,2013,138-139:51. |
| [10] | Kamiuchi N;Haneda M;Ozawa M .CO Oxidation over Pt/Ce-Zr oxide catalysts with low content of platinum and cerium components[J].Catalysis Today,2013,201:79. |
| [11] | Shinde V M;Madras G .Nanostructured Pd modified Ni/CeO2 catalyst for water gas shift and catalytic hydrogen combustion reaction[J].Appl. Catal., B,2013,132-133:28. |
| [12] | Wang X;Zheng Y Y;Lin J X .Highly dispersed Mn-Ce mixed oxides supported on carbon nanotubes for low-temperature NO Reduction with NH3[J].Catalysis Communications,2013,37:96. |
| [13] | Drenchev N;Spassova I;Ivanova E;Khristova M, Had-jiivanov K .Cooperative effect of Ce and Mn in MnCe/Al2O3 environmental catalysts[J].Applied Catalysis B:Environmental,2013,138-139:362. |
| [14] | Zhao Z K;Jin R H;Bao T;Yang H L, Lin X L, Wang G R .Mesoporous CexMn1-xO2 composites as novel alternative carriers of supported Co3O4 catalysts for CO preferential oxidation in H2 stream[J].International Journal of Hydrogen Energy,2012,37:4774. |
| [15] | Peng C T;Lia H K;Liaw B J;Chen Y Z .Removal of CO in excess hydrogen over CuO/Ce1-xMnxO2 catalysts[J].Chemica1 Engineering Journal,2011,172:452. |
| [16] | Li J;Zhu P F;Zhou R X .Effect of the preparation method on the performance of CuO-MnOx-CeO2 catalysts for se-lective oxidation of CO in H2-rich streams[J].Journal of Power Sources,2011,196:9590. |
| [17] | Poggio-Fraccari E;Sambeth J;Baronetti G;Mari?o F .Cu/MnOx-CeO2 and Ni/MnOx-CeO2 catalysts for the water-gas shift reaction:metal-support interaction[J].Int.J.Hydro-gen Energy,2014,39:8675. |
| [18] | Lai, W.;Song, W.;Pang, L.;Wu, Z.;Zheng, N.;Li, J.;Zheng, J.;Yi, X.;Fang, W..The effect of starch addition on combustion synthesis of NiMo-Al _2O_3 catalysts for hydrodesulfurization[J].Journal of Catalysis,2013:80-91. |
| [19] | Liang Q;Wu X D;Weng D;Xu H B .Oxygen activation on Cu/Mn-Ce mixed oxides and the role in diesel soot oxidation[J].Catalysis Today,2008,139:113. |
| [20] | Lu H F;Zhou Y;Huang H F;Zhang B, Chen Y F .In-situ synthesis of monolithic Cu-Mn-Ce/cordierite catalysts to-wards VOCs combustion[J].Journal of Rare Earths,2011,29:855. |
| [21] | Gupta A;Hegde M S;Priolkar K R;Waghmare U V, Sarode P R, Emura S .Structural investigation of activated lattice oxygen in Ce1-xSnxO2 and Ce1-x-ySnxPdyO2-δ by EXAFS and DFT calculation[J].Chemistry of Materials,2009,21:5836. |
| [22] | Djinovi?P;Batista J;Pintar A .Calcination temperature and CuO loading dependence on CuO-CeO2 catalyst activ-ity for water-gas shift reaction[J].Appl.Catal., A,2008,347:23. |
| [23] | Li K;Tang X L;Yi H H;Ning P, Kang D J, Wang C .Low-temperature catalytic oxidation of NO over Mn-Co-Ce-Ox catalyst[J].Chemica1 Engineering Journal,2012,192:99. |
| [24] | Liu G;Yue R;Jia Y;Ni Y, Yang J, Liu H, Wang Z, Wu X, Chen Y .Catalytic oxidation of benzene over Ce-Mn ox-ides synthesized by flame spray pyrolysis[J].Particuology,2013,11:454. |
| [25] | Mrabet D;Abassi A;Cherizol R;Do T-O .One-pot sol-vothermal synthesis of mixed Cu-Ce-Ox nanocatalysts and their catalytic activity for low temperature CO oxidation[J].Appl. Catal., A,2012,447-448:60. |
| [26] | Qi L;Yu Q;Dai Y;Tang C J, Liu L J, Zhang H L, Gao F, Dong L,Chen Y .Influence of cerium precursors on the structure and reducibility of mesoporous CuO-CeO2 cata-lysts for CO oxidation[J].Appl. Catal., B,2012,119-120:308. |
| [27] | Wang Z;Qu Z P;Quan X;Li Z, Wang H, Fan R .Selective catalytic oxidation of ammonia to nitrogen over CuO-CeO2 mixed oxides prepared by surfactant-templated method[J].Appl. Catal., B,2013,134-135:153. |
| [28] | Zeng S H;Zhang W L;Guo S L;Su H Q .Inverse rod-like CeO2 supported on CuO prepared by hydrothermal method for preferential oxidation of carbon monoxide[J].Catalysis Communications,2012,23:62. |
| [29] | Zhao F Z;Ji S F;Wu P Y;Li Z F, Li C Y .Catalytic oxida-tion of CO over CuxCe1-xO2-x/SBA-15/FeCrAl monolithic Catalysts[J].Catalysis Today,2009,147:S215. |
| [30] | Ayastuy J L;Gurbani A;González-Marcos M P;Gutiér-rez-Ortiz M A .Selective CO oxidation in H2 streams on CuO/CexZr1-xO2 catalysts:correlation between activity and low temperature reducibility[J].International Journal of Hydrogen Energy,2012,37:1993. |
| [31] | DRIFTS study of Cu-Zr-Ce-O catalysts for selective CO oxidation[J].International journal of hydrogen energy,2009(23):9324. |
| [32] | Gómez L E;Miró E E;Boix A V .Spectroscopic charac-terization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction[J].International Journal of Hydrogen Energy,2013,38:5645. |
| [33] | Rodriguez J A;Hanson J C;Stacchiola D;Senanayake S D .In situ/operando studies for the production of hydrogen through the water-gas shift on metal oxide catalysts[J].Physical Chemistry Chemical Physics,2013,15:12004. |
| [34] | Li J;Zhu P F;Zuo S F;Huang Q Q, Zhou R X .Influence of Mn doping on the performance of CuO-CeO2 catalysts for selective oxidation of CO in hydrogen-rich streams[J].Appl.Catal., A,2010,381:261. |
| [35] | Luo MF;Ma JM;Lu JQ;Song YP;Wang YJ .High-surface area CuO-CeO2 catalysts prepared by a surfactant-templated method for low-temperature CO oxidation[J].Journal of Catalysis,2007(1):52-59. |
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