Preparation of Ce0.1+xTi0.5-xAl0.2Y0.1La0.1O1.8 and Its Application in Three-way Catalyst

Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (8): 1625.

• Articles • Previous Articles Next Articles

Preparation of Ce_0.1+xTi_0.5-xAl_0.2Y_0.1La_0.1O_1.8 and Its Application in Three-way Catalyst

WANG Kang-Cai, LIU Zhi-Min, WANG Jian-Li, CAI Li, CHEN Yao-Qiang, GONG Mao-Chu*

Key Laboratory of Green Chemistry & Technology Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China

Received:2008-10-21 Online:2009-08-10 Published:2009-08-10
Contact: GONG Mao-Chu. E-mail: nic7501@scu.edu.cn
Supported by:
国家“八六三”计划(批准号: 2006AA062347)和国家自然科学基金(批准号: 20773090)资助.

Abstract

Abstract:

Ce_0.1+xTi_0.5-xAl_0.2Y_0.1La_0.1O_1.8(0≤x≤0.4) mixed oxides were prepared by co-precipitation method and characterized by means of X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), nitrogen adsorption(BET), oxygen storage capacity(OSC), H₂-temperature programmed reduction(H₂-TPR) and NH₃-temperature programmed desorption(NH₃-TPD). The results of XRD revealed that there was only one single cubic phase in Ce_0.1+xTi_0.5-xAl_0.2Y_0.1La_0.1O_1.8 system when x value increased from 0.2 to 0.4. The results of XPS showed that the ratio of superficial Ce⁴⁺/Ce³⁺ is maximal when x is 0.2. With the increase of Ce/Ti ratio, OSC is increased to a maximum value, and then gradually decreased. When x value is 0.2, the OSC reaches to 660 μmol/g, and the reduction temperature of Ce⁴⁺ is the lowest according to the H₂-TPR test(616 ℃). In this paper, a series of Pt/Ce_0.1+xTi_0.5-xAl_0.2Y_0.1La_0.1O_1.8 three-way catalysts were prepared and the catalytic activities of catalysts were investigated. The results revealed that Pt/Ce_0.3Ti_0.3Al_0.2Y_0.1La_0.1O_1.8 exhibits excellent low-temperature catalytic activity. The light-off temperature of C₃H₈, CO and NO over Pt/Ce_0.3Ti_0.3Al_0.2Y_0.1La_0.1O_1.8 is 236, 147 and 228 ℃, respectively.

Key words: Ce_0.1+xTi_0.5-xAl_0.2Y_0.1La_0.1O_1.8; Molar ratio of Ce/Ti; Support material; Three-way catalyst

TrendMD:

WANG Kang-Cai, LIU Zhi-Min, WANG Jian-Li, CAI Li, CHEN Yao-Qiang, GONG Mao-Chu*. Preparation of Ce_0.1+xTi_0.5-xAl_0.2Y_0.1La_0.1O_1.8 and Its Application in Three-way Catalyst[J]. Chem. J. Chinese Universities, 2009, 30(8): 1625.

References

[1]Genti G., Fornasiero P., Graziani M., et al.. Top Catal.[J], 2001, 16/17(124): 173—180
[2]Iwamoto M., Yahiro H.. Catal. Today[J], 1994, 22(1): 5—18
[3]Jen H. W., Graham G. W., Chun W., et al.. Catal. Today[J], 1999, 50(2): 309—328
[4]Liotta L. F., Macaluso A., Longo A., et al.. Appl. Catal. A[J], 2003, 240(1/2): 295—309
[5]Hilaire S., Wang X., Luo T., et al.. J. Appl. Catal. A[J], 2001, 215(1/2): 271—278
[6]Kaspar J., Fornasier P., Graziani M.. Catal. Today[J], 1999, 50(2): 285—298
[7]Nagai Y., Yamamoto T., Tanaka T., et al.. Catal. Today[J], 2002, 74(3/4): 225—234
[8]Nguyen T. B., Deloume J. P., Perrichon V.. Appl. Catal. A[J], 2003, 249(2): 273—284
[9]Liotta L. F., Deganello G.. J. Mole. Catal. A[J], 2003, 204/205: 763—770
[10]Roh H. S., Potdar H. S., Jun K. W., et al.. Catal. Lett.[J], 2004, 93(3/4): 203—217
[11]Talo A., Lahtinen J., Hautojarvi P.. Appl. Catal. B[J], 1995, 5(3): 221—231
[12]Kobayashi T., Yamada T., Kayano K.. Appl. Catal. B[J], 2001, 30(3/4): 287—292
[13]CAI Li(蔡黎), PI Zhan(皮展), GONG Mao-Chu(龚茂初), et al.. Chin. J. Catal.(催化学报)[J], 2008, 22(2): 108—112
[14]Mei D. J., Chen Y. Q., Zhong J. B., et al.. J. of Rare Earths[J], 2007, 25: 311—315
[15]ZHEN Kai-Ji(甄开吉), WANG Guo-Jia(王国甲), BI Ying-Li(毕颖丽), et al.. The Effect of Basic Catalysis(3th Ed.)[催化作用基础(第三版)][M], Beijing: Science Press, 2005
[16]Amita V., Amish G., Joshi A. K., et al.. Appl. Surf. Sci.[J], 2006, 252(14): 5131—5142
[17]Yang S. X., Zhu W. P., Jiang Z. P., et al.. Appl.Surf. Sci.[J], 2006, 252(24): 8499—8505
[18]Larsson P., Andersson A.. J. Catal.[J], 1998, 179(1): 72—89
[19]Shyu J. Z., Weber W. H., Gandhi H. S.. J. Phys. Chem.[J], 1988, 92: 4964—4970
[20]Yang S. X., Chen Y. J., Wan J. F., et al.. Appl. Surf. Sci.[J], 2005, 246(1—3): 222—228
[21]MAO Xiao-Bo(毛小波), CHEN Yao-Qiang(陈耀强), ZHONG Jun-Bo(钟俊波), et al.. Chem. J. Chinese Universities(高等学校化学学报)[J], 2007, 28(3): 559—561
[22]LIN Tao(林涛), LI Wei(李伟), GONG Mao-Chun(龚茂初), et al.. Acta Phys. Chim. Sin.(物理化学学报)[J], 2007, 23(12): 1851—1856
[23]Shali N. B., Suguman S.. Mater. Res. Bull.[J], 2007, 42(9): 1777—1783
[24]Nunan J. G., Robota H. J., Cohn M. J., et al.. J. Catal.[J], 1992, 133(2): 309—324
[25]Silva P. P., Silva F. A., Portela L. S., et al.. Catal. Today[J], 2005, 107/108: 734—740

Preparation of Ce_0.1+xTi_0.5-xAl_0.2Y_0.1La_0.1O_1.8 and Its Application in Three-way Catalyst

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 0

Recommended Articles

Metrics

Comments