考察了助剂Ni对以改性氧化铝为载体的单Pd密偶催化剂的影响.结果表明，掺杂Ni可以明显改善对C3H8的催化性能，尤其对老化催化剂效果显著.此外， Ni的添加使老化催化剂Pd/Al2O3的起燃温度(T50)和完全转化温度(T90)分别降低31和30oC.单反应测试结果表明，添加Ni能明显提高对C3H8+ NO反应的催化性能.采用H2程序升温还原、CO吸附、高倍透射电镜和X射线光电子能谱等手段对新鲜和老化催化剂进行了表征.结果表明，掺杂Ni不仅可以抑制活性组分PdOx的烧结，减少金属态Pd0的产生，而且可以提高PdOx物种的可还原能力和有效比表面积.
The influence of a nickel promoter on the catalytic behavior of a modified alumina supported Pd close-coupled catalyst was investigated. Doping with nickel improved the catalytic activity for the reactions of C3H8, especially over the aged catalyst.T50 andT90 of the aged Pd catalyst were de-creased by 31 and 30 °C, respectively. The single reaction results revealed that doping with Ni pro-moted the catalytic activity for the C3H8 + NO reaction. The fresh and aged catalysts were character-ized by H2-temperature-programmed reduction, CO chemisorption, high resolution transmission electron microscopy, and X-ray photoelectron spectroscopy, which revealed that the doping with Ni inhibited the sintering of active PdOx species and the formation of undesired metallic Pd0, and led to improved reducibility of active PdOx and increased the surface area of PdOx species.
参考文献
| [1] | Gandhi HS.;Graham GW.;McCabe RW. .Automotive exhaust catalysis[J].Journal of Catalysis,2003(1/2):433-442. |
| [2] | Ka?par J;Fornasiero P;Hickey N .[J].Catalysis Today,2003,77:419. |
| [3] | Li M;Wu X D;Wan J;Liu S Ran R Weng D .[J].Catalysis Today,2015,242:322. |
| [4] | Lan L;Chen S H;Zhao M;Gong M C Chen Y Q .[J].Journal of Molecular Catalysis A:Chemical,2014,394:10. |
| [5] | 姚艳玲,方瑞梅,史忠华,龚茂初,陈耀强.La2O3对Pd密偶催化剂性能的影响[J].催化学报,2011(04):589-594. |
| [6] | Wang G;You R;Meng M .[J].FUEL,2013,103:799. |
| [7] | Neyertz C;Volpe M;Gigola C .Methane combustion over Pd/gamma-Al2O3 and Pd-VOx/gamma-Al2O3 catalysts[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2004(1/2):137-145. |
| [8] | Spinicci R;Tofanari A .[J].Applied Catalysis A:General,2002,227:159. |
| [9] | 董林.负载型催化剂的表面相互作用及其在大气分子污染物NO和CO消除中的应用基础研究[J].催化学报,2009(11):1150-1169. |
| [10] | Hungría A B;Calvino J J;Anderson J A;Martínez-Arias A .[J].Applied Catalysis B:Environmental,2006,62:359. |
| [11] | Pan X Q;Zhang Y B;Zhang B;Miao Z Z Wu T X Yang X G .[J].Chemical Research in Chinese Universities,2013,29:952. |
| [12] | Fernández-García M;Martínez-Arias A;Belver C;Anderson J A Conesa J C Soria J .[J].Journal of Catalysis,2000,190:387. |
| [13] | Trillat J F;Massardier J;Moraweck B;Praliaud H Renouprez A J .[J].Studies in surface science and catalysis,1998,116:103. |
| [14] | Elhamdaoui A;Bergeret G;Massardier J;Primet M Renouprez A .[J].Journal of Catalysis,1994,148:47. |
| [15] | Hungría A B;Iglesias-Juez A;Martínez-Arias A;Fernández-García M Anderson J A Conesa J C Soria J .[J].Journal of Catalysis,2002,206:281. |
| [16] | Hungría A B;Browning N D;Erni R P;Fernández-García M Conesa J C Pérez-Omil J A Martínez-Arias A .[J].Journal of Catalysis,2005,235:251. |
| [17] | 张淑娟,李兰冬,章福祥,薛斌,关乃佳.Ni-Al2O3催化剂上丙烷选择性还原NO[J].催化学报,2005(10):929-932. |
| [18] | Hungría A B;Fernández-García M;Anderson J A;Martínez-Arias A .[J].Journal of Catalysis,2005,235:262. |
| [19] | Martínez-Arias A;Fernández-García M;Hungría A B;Iglesias-Juez A Anderson J A .[J].Catalysis Today,2007,126:90. |
| [20] | 方瑞梅,崔亚娟,陈思洁,尚鸿燕,史忠华,龚茂初,陈耀强.性能优异的Rh改性的Pd/Al2O3密偶催化剂[J].催化学报,2015(2):229-236. |
| [21] | Zhao B;Wang Q Y;Li G F;Zhou R X .[J].J Environ Chem Eng,2013,1:534. |
| [22] | Narui K;Furuta K;Yata H;Nishida A Kohtoku Y Matsuzaki T .[J].Catalysis Today,1998,45:173. |
| [23] | Bonarowska M.;Juszczyk W.;Karpinski Z.;Pielaszek J. .Characterization of Pd-Au/SiO2 catalysts by X-ray diffraction, temperature-programmed hydride decomposition, and catalytic probes[J].Journal of Catalysis,2000(2):304-315. |
| [24] | Simplício L M T;Brand?o S T;Sales E A;Lietti L Bozon-Verduraz F .[J].Applied Catalysis B:Environmental,2006,63:9. |
| [25] | Bourane A;Derrouiche S;Bianchi D .Impact of Pt dispersion on the elementary steps of CO oxidation by O-2 over Pt/Al2O3 catalysts[J].Journal of Catalysis,2004(2):288-297. |
| [26] | Usami Y;Kagawa K;Kawazoe M;Matsumura Y Sakurai H Haruta M .[J].Applied Catalysis A:General,1998,171:123. |
| [27] | Xiao L H;Sun K P;Xu X L;Li X N .[J].CATALYSIS COMMUNICATIONS,2005,6:796. |
| [28] | 刘建英,赵明,徐成华,刘盛余,张雪乔,陈耀强.超声辅助合成铈锆铝氧化物及其负载Pd催化剂对乙醇汽油车尾气的净化性能[J].催化学报,2013(04):751-757. |
| [29] | Kobayashi T;Yamada T;Kayano K .[J].Applied Catalysis B:Environmental,2001,30:287. |
| [30] | Zhao M;Zhang H L;Li X;Chen Y Q .[J].J Energy Chem,2014,23:755. |
| [31] | Talo A;Lahtinen J;Hautoj?rvi P .[J].Applied Catalysis B:Environmental,1995,5:221. |
| [32] | Yang L Y;Lin S Y;Yang X;Fang W M Zhou R X .[J].Journal of Hazardous Materials,2014,279:226. |
| [33] | Shinjoh H;Muraki H;Fujitani Y .[J].Applied Catalysis,1989,49:195. |
| [34] | Li Y;Wang X X;Xie C;Song C S .[J].Applied Catalysis A:General,2009,357:213. |
| [35] | Tanabe T;Nagai Y;Dohmae K;Takagi N Takahashi N Matsumoto S Shinjoh H .[J].Applied Catalysis B:Environmental,2011,105:41. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%