以沉积--沉淀法制备了系列Au/CuMn催化剂,并对催化剂进行了XRD和XPS等表征,研究了Au负载量和催化剂焙烧温度对Au/CuMn催化剂性能的影响.实验结果显示,60℃烘干、Au理论负载量为3%的催化剂性能最佳,在50℃的反应条件下,NO的转化率达到72.4%,但催化剂失活较快.XPS分析显示,催化剂表面的Au3+与吸附氧物种Oads.是反应的活性中心,反应过程中催化剂表面氧化态Au3+与Oads.物种部分被还原,可能是催化剂失活的重要原因.另外,反应后在催化剂表面生成的亚硝酸盐、硝酸盐和碳酸盐等物种,覆盖了活性中心,也是导致催化剂失活的原因之一.
参考文献
| [1] | Wang Y;Zong B N;Bao X H et al.[J].Catalysis Letters,2000,66(04):237. |
| [2] | Beutel T;Adelman B;Sachtler W M H .[J].Catalysis Letters,1996,37(1-2):125. |
| [3] | Li Z J;Flytzani-Stephanopoulos M .[J].Journal of Catalysis,1999,182(01):313. |
| [4] | Shi C;Cheng M J;Qu Z P et al.[J].Chinese Journal of Catalysis,2001,22:555. |
| [5] | Mosqueda-Jimenez BI.;Jentys A.;Seshan K.;Lercher JA. .Structure-activity relations for Ni-containing zeolites during NO reduction - II. Role of the chemical state of Ni[J].Journal of Catalysis,2003(2):375-385. |
| [6] | Kung M C;Kung H H .[J].Topics in Catalysis,2000,10(1-2):21. |
| [7] | He C;Paulus M;Find J et al.[J].Journal of Physical Chemistry B,2005,109(33):15906. |
| [8] | Li J;Hao J;Fu L et al.[J].Topics in Catalysis,2004,30(13):81. |
| [9] | He C;Koehler K .[J].Physical Chemistry Chemical Physics,2006,8(07):898. |
| [10] | Bennici S;Gervasini A;Ravasio N et al.[J].Journal of Physical Chemistry B,2003,107(22):5168. |
| [11] | He H;Zhang C;Yu Y .[J].Catalysis Today,2004,90(3-4):191. |
| [12] | Fierro G;Morpurgo S;Jacono M L et al.[J].Applied Catalysis B:Environmental,2001,30(1-2):173. |
| [13] | Fierro G;Morpurgo S;Jacono M L et al.[J].Applied Catalysis B:Environmental,2002,36(04):251. |
| [14] | Fierro G;Morpurg S;Jacono M L et al.[J].Applied Catalysis B:Environmental,2003,45(02):91. |
| [15] | Fierro G;Jacono M L;Dragone R et al.[J].Applied Catalysis B:Environmental,2005,57(03):153. |
| [16] | Fierro C;Dragone R;Ferraris G .[J].Applied Catalysis B:Environmental,2008,78(1-2):183. |
| [17] | Ueda A;Haruta M .[J].Gold Bulletin,1999,32(01):3. |
| [18] | Minico S;Scire S;Crisafulli C et al.[J].Applied Catalysis B:Environmental,2000,28(3-4):245. |
| [19] | Andreeva D;Idakiev V;Tabakova T et al.[J].Journal of Catalysis,1996,158(t):354. |
| [20] | Andreeva D;Idakiev V;Tabakova T et al.[J].Applied Catalysis A:General,1996,134(02):275. |
| [21] | Ueda A;Haruta M .[J].Applied Catalysis B:Environmental,1998,18(1-2):115. |
| [22] | Epling W S;Hoflund G B;Weaver J F .[J].Journal of Physical Chemistry,1996,100(23):9929. |
| [23] | Visco A M;Neri F;Neri G et al.[J].Physical Chemistry Chemical Physics,1999,1(11):2869. |
| [24] | A.Karpenko;R.Leppelt;V.Plzak .The role of cationic Au~(3+)and nonionic Au~0 species in the low-temperature water-gas shift reaction on Au/CeO2 catalysts[J].Journal of Catalysis,2007(2):231-242. |
| [25] | Attekum P M T M;Velden J W A;Trooster J M .[J].Inorganic Chemistry,1980,19(03):701. |
| [26] | Saltsburg Q F H;Stephanopoulos M F .[J].Science,2003,301(04):935. |
| [27] | Fu Q;Deng WL;Saltsburg H;Flytzani-Stephanopoulos M .Activity and stability of low-content gold-cerium oxide catalysts for the water-gas shift reaction[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2005(1/2):57-68. |
| [28] | Su YS.;Lin SD.;Lee MY. .XPS and DRS of Au/TiO2 catalysts: effect of pretreatment[J].Catalysis Letters,1999(1/2):49-53. |
| [29] | Pireaux J J;Liehr M;Thiry P A et al.[J].Surface Science,1984,141(01):221. |
| [30] | Ivanova S;Petit C;Pitchon V .[J].Applied Catalysis A:General,2004,267(01):191. |
| [31] | wu X D;Fan J;Ran R et al.[J].Chemical Engineering Journal,2005,109(1-3):133. |
| [32] | Wu X;Liang Q;Weng D et al.[J].Catalysis Today,2007,126(3-4):430. |
| [33] | Teiuca L G;Bell A T;Fierro J L G et al.[J].Applied Surface Science,1988,31(03):301. |
| [34] | Pfau A;Schierbaum K D .[J].Surface Science,1994,321(1-2):71. |
| [35] | Dupin J;Gonbeau D;Vinatier P et al.[J].Physical Chemistry Chemical Physics,2000,2(06):1319. |
| [36] | Wu X;Liang Q;Weng D .[J].Catalysis Today,2007,126(3-4):430. |
| [37] | Mullins DR;Robbins MD;Zhou J .Adsorption and reaction of methanol on thin-film cerium oxide[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,2006(7):1547-1558. |
| [38] | Pozdnykova O;Teschner D;Wootsch A et al.[J].Journal of Catalysis,2006,237(01):17. |
| [39] | Kim C H;Thompson L T .[J].Journal of Catalysis,2005,230(01):66. |
| [40] | Go'mez P R;Rico V;Borris A et al.[J].Journal of Physical Chemistry C,2009,113(30):13341. |
| [41] | Delebecque A;Thomas C;Pradier C M et al.[J].Journal of Physical Chemistry C,2008,112(08):2964. |
| [42] | Matsuta H;Hirokawa K .[J].Applied Surface Science,1988,35(01):10. |
| [43] | Tabata K.;Choso T.;Munakata H.;Kamada M. .Photoelectron spectroscopy investigation of NO adsorption on defects of LiNbO3 surfaces[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,1998(1):93-98. |
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