以碳酸铵水溶液为沉淀剂,改变前驱体盐溶液的浓度,采用共沉淀法制得了一系列Ce0.5Zr0.5O2固溶体材料.以此系列材料为载体制备了负载型单Pd三效催化剂,并利用N2吸附-脱附、X射线衍射、储氧量测定和程序升温还原等技术对材料了进行表征.结果表明,所制Ce0.5Zr0.5O2材料具有优异的抗高温老化性能和氧化还原性能,且盐溶液的浓度对材料及其负载型Pd三效催化剂性能的影响较大.当盐溶液浓度为0.3 mol/L时,制备材料的织构性能最佳,经1000℃老化5h后其比表面积和孔体积分别为53.0 m2/g和0.17 cm3/g.所制得的三效催化剂对CO,NO和C3H8具有低的起燃温度和完全转化温度,表现出最佳的催化性能,具有良好的应用前景.
参考文献
| [1] | Ka(s)par J;Fornasiero P;Graziani M .[J].Catalysis Today,1999,50:285. |
| [2] | Liotta L F;Macaluso A;Longo A;Pantaleo G Martorana A Deganello G .[J].Applied Catalysis A:General,2003,240:295. |
| [3] | Suhonen S;Valden M;Hietikko M;Laitinen R Savim(a)ki A H(a)rk(o)nen M .[J].Applied Catalysis A:General,2001,218:151. |
| [4] | Trovarelli A.;Rocchini E.;de Leitenburg C.;Dolcetti G.;Boaro M. .Some recent developments in the characterization of ceria-based catalysts[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2001(0):584-591. |
| [5] | Kaspar J.;Fornasiero P.;Baiducci G.;Di Monte R.;Hickey N.;Sergo V. .Effect of ZrO2 content on textural and structural properties of CeO2-ZrO2 solid solutions made by citrate complexation route[J].Inorganica Chimica Acta,2003(0):217-226. |
| [6] | Thammachart M;Meeyoo V;Risksomboon T;Osuwan S .[J].Catalysis Today,2001,68:53. |
| [7] | Papavasiliou A;Tsetsekoua A;Matsouka V;Konsolakis M Yentekakis I V .[J].Applied Catalysis A:General,2010,382:73. |
| [8] | Fu Y P;Hu S H;Liu B L .[J].Ceramics International,2009,35:3005. |
| [9] | Lin S S Y;Daimon H;Ha S Y .[J].Applied Catalysis A:General,2009,366:252. |
| [10] | Chun W;Graham G W;McCabe R W .[P].US 6 423 293,2002. |
| [11] | Wu X D;Fan J;Ran R;Yang J Weng D .[J].Journal of Alloys and Compounds,2005,395:135. |
| [12] | Bonneau L;Pijolat M;Touret O .[P].US 5 928 619,1999. |
| [13] | Letichevsky S;Tellez C A;de Avillez R R;da Silva M I P Fraga M A Appel L G .[J].Applied Catalysis B:Environmental,2008,58:203. |
| [14] | 刘华,史忠华,陈耀强,赵彬,龚茂初.以氨水和碳酸铵为沉淀剂制备氧化铝的对比研究[J].无机化学学报,2004(06):688-692. |
| [15] | 张顺海,蒋平平,郭耘,郭杨龙,王筠松,吴东方,卢冠忠.氧化共沉淀法制备纳米级铈锆固溶体[J].中国稀土学报,2003(z2):64-66. |
| [16] | 陈耀强,王健礼,史忠华,赵明,林涛,龚茂初,袁书华.机动车尾气净化催化剂的研究进展[J].中国科学基金,2008(01):8-12. |
| [17] | Boaro M.;Dolcetti G.;Trovarelli A.;de Leitenburg C. .The dynamics of oxygen storage in ceria-zirconia model catalysts measured by CO oxidation under stationary and cycling feedstream compositions[J].Journal of Catalysis,2000(2):338-347. |
| [18] | Blanchard G;Quemere E .[P].US 6 506 705,2003. |
| [19] | He H;Dai H X;Ng L H;Wong K W Au C T .[J].Journal of Catalysis,2002,206:1. |
| [20] | Bensalem A.;Delamar M.;Bugli G.;Bozonverduraz F. .PREPARATION AND CHARACTERIZATION OF HIGHLY DISPERSED SILICA-SUPPORTED CERIA[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,1995(1):81-93. |
| [21] | Usmen R K;Graham G W;Watkins W L H;McCabe R W .[J].Catalysis Letters,1995,30:53. |
| [22] | Ka(s)par J;Fomasiero P;Hickey N .[J].Catalysis Today,2003,77:419. |
| [23] | Morikawa A;Suzuki T;Kanazawa T;Kikuta K;Suda A;Shinjo H .A new concept in high performance ceria-zirconia oxygen storage capacity material with Al2O3 as a diffusion barrier[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(3/4):210-221. |
| [24] | He H;Dai H X;Au C T .[J].Catalysis Today,2004,90:245. |
| [25] | Yao H C;Yu Yao Y F .[J].Journal of Catalysis,1984,86:254. |
| [26] | de Leitenburg C;Trovarelli A;Llorca J;Cavani F Bini G .[J].Applied Catalysis A:General,1996,139:161. |
| [27] | Vidmar P.;Kaspar J.;Gubitosa G.;Graziani M.;Fornasiero P. .EFFECTS OF TRIVALENT DOPANTS ON THE REDOX PROPERTIES OF CE0.6ZR0.4O2 MIXED OXIDE[J].Journal of Catalysis,1997(1):160-168. |
| [28] | Bruce L A;Hoang M;Hughes A E;Tumey T W .[J].Applied Catalysis A:General,1996,134:351. |
| [29] | 赵波,王秋艳,葛昌华,李光凤,周仁贤.Ce0.67Zr0.33O2材料的制备和表征及其负载单Pd三效催化剂的性能[J].催化学报,2009(05):407-413. |
| [30] | 蔡黎,赵明,皮展,龚茂初,陈耀强.Ce-Zr-La-Al2O3的制备及负载的单Pd三效催化剂[J].催化学报,2008(02):108-112. |
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%