Influence of Calcination Temperature on the Dispersion Behavior and CO Oxidation Properties of CuO/γ-Al2O3 Catalyst

doi:10.3724/SP.J.1077.2008.00454

Abstract

Abstract:

CuO/γ-Al₂O₃ samples were prepared by impregnating γ-Al₂O₃with an aqueous solution containing requisite amount of Cu(NO₃)₂. BET, XRD, UV-DRS, H₂-TPR and CO oxidation were employed to characterize the dispersion, reduction behavior and catalytic properties of CuO/γ-Al₂O₃ catalyst calcinated at different temperatures. The results indicate that the dispersion capacity of CuO on the surface of γ-Al₂O₃ is about 0.56mmol/100m² when it is calcinated at 450℃; while for the samples calcinated at 750℃, Cu²⁺ would occupy both the octahedral and tetrahedral vacant sites on the (110) plane of γ-Al₂O₃. For samples with low CuO loading amount, only the reduction peak of Cu²⁺ in octahedral coordination environment is observed in xxCu/Al-450 samples; while for xx Cu/Al-750 samples, the reduction peaks of Cu²⁺ in octahedral and tetrahedral coordination environment can be observed and the reduction of Cu²⁺ in octahedral coordination environment would promote the reduction of Cu²⁺ in tetrahedral coordination environment. The CO oxidation results indicate that the activity of dispersed CuO species in octahedral coordination environment is higher than that in tetrahedral coordination environment.

Key words: CuO/γ-Al₂O₃, CO oxidation, calcination temperature

CLC Number:

O643

WANG Zhe,ZHAO Xi,WAN Hai-Qin,ZHU Jie,LIU Bin,DONG Lin. Influence of Calcination Temperature on the Dispersion Behavior and CO Oxidation Properties of CuO/γ-Al₂O₃ Catalyst[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.00454.

References

[1] Larsson P, Andersson A, Wallenberg L R, et al. J. Catal., 1996, 163 (2): 279--293.
[2] Larsson P, Andersson A. J. Catal., 1998, 179 (1): 72--89.
[3] Centi G, Nigro C, Perathoner S, et al. Catal. Today, 1993, 17 (1): 159--166.
[4] Centi G, Perathoner S, Kartheuser B, et al. Catal. Today, 1993, 17 (1): 103--110.
[5] Centi G, Perathoner S, Kartheuser B, et al. Appl. Catal. B: Environ., 1992, 1 (2): 129--137.
[6] Park P W, Ledford J S. Appl. Catal. B: Environ., 1998, 15 (3-4): 221--231.
[7] Turek A M, Wachs I E, DeCanio E. J. Phys. Chem., 1992, 96 (12): 5000--5007.
[8] Schuit G A, Gates B C. AIChE J., 1973, 19 (3): 417--438.
[9] Jimenez-Conzalez J, Schmeiber D. Surf. Sci., 1991, 250 (1-3): 59--70.
[10] Xia W S, Wan H L, Chen Y. J. Mol. Catal. A: Chem., 1999, 138 (2-3): 185--195.
[11] Zhu H Y, Shen M M, Wu Y, et al. J. Phys. Chem. B, 2005, 109 (23): 11720--11726.
[12] Xie Y C, Tang Y Q. Adv. Catal., 1990, 37: 1--43.
[13] Xu B, Dong L, Chen Y. J. Chem. Soc. Faraday Trans., 1998, 94 (13): 1905--1909.
[14] Zhu H Y, Wu Y, Zhao X, et al. J. Mol. Catal. A: Chem., 2006, 243 (1): 24--30.
[15] Chary K V R, Seela K K, Sagar G V, et al. J. Phys. Chem. B, 2004, 108 (2): 658--663.
[16] Chary K V R, Sagar G V, Naresh D, et al. J. Phys. Chem. B, 2005, 109 (19): 9437--9444.
[17] Velu S, Suzuki K, Okazaki M, et al. J. Catal., 2000, 194 (2): 373--384.
[18] Friedman R M, Freeman J J. J. Catal., 1978, 55 (1): 10--28.
[19] Praliau H, Mikhailenko S, Chajar Z, et al. Appl. Catal. B: Environ., 1998, 16 (4): 359--374.
[20] Chen L Y, Horiuchi T, Osaki T, et al. Appl. Catal. B: Environ., 1999, 23 (4): 259--269.
[21] 董林, 金永漱, 陈懿. 中国科学(B辑), 1996, 26 (6): 561--566.
[22] Hurst N W, Gentry S, Jones, A. Catal. Rev. Sci. Eng., 1982, 24 (2): 233--309.
[23] Luo M F, Fang P, He M, et al. J. Mol. Catal. A: Chem, 2005, 239 (1-2): 243--248.

Influence of Calcination Temperature on the Dispersion Behavior and CO Oxidation Properties of CuO/γ-Al₂O₃ Catalyst

PDF (PC)

Knowledge

Cited

Abstract

Cite this article

share this article

References

Related Articles 6

Recommended Articles

Metrics

Comments

[1]	MO Wen-Long, MA Feng-Yun, LIU Yue-E, LIU Jing-Mei, ZHONG Mei, Aisha· Nulahong. Influence of Calcination Temperature on Performance of NiO/γ-Al₂O₃ Catalyst for CO₂-CH₄ Reforming to Produce Syngas [J]. Journal of Inorganic Materials, 2016, 31(3): 234-240.
[2]	ZHENG Yi-Fan, ZHONG Shu-Bin, LV De-Yi, ZHOU Huan, HUAN Chang-Yong. Effect of Calcination Temperature of Cu-Mn/γ-Al₂O₃ Catalysts on Performance for Catalytic Oxidation of Toluene [J]. Journal of Inorganic Materials, 2015, 30(7): 694-698.
[3]	LIU Yang-Long, ZHENG Yu-Ying, SHANG Peng-Bo. Preparation, Characterization and Photocatalytic Property of Eu-doped TiO₂ Hollow Microspheres [J]. Journal of Inorganic Materials, 2015, 30(7): 699-705.
[4]	GONG Yun, CHEN Hang-Rong, CUI Xiang-Zhi, JIANG Wan, SHI Jian-Lin. Pd Loaded Mesoporous ZrO₂-TiO₂ Composite and Its CO Catalytic Oxidation Property [J]. Journal of Inorganic Materials, 2013, 28(9): 992-996.
[5]	ZHAO Li, FAN Jia-Jie, LI Jing, DAI Guo-Tian, WANG Shi-Min. Preparation and Photoelectric Properties of ZnO/TiO₂ Nanotubes Film Electrodes [J]. Journal of Inorganic Materials, 2012, 27(6): 585-590.
[6]	SHEN Ge,DU Pi-Yi. Relationship between Phase Formation and Calcination Temperature of Sol-Gel Derived PLT Thin Film [J]. Journal of Inorganic Materials, 2002, 17(1): 117-124.