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利用不同的沉淀剂制备了一系列储氧材料,并应用BET、XRD、TPR及其储氧量的测定等方法对储氧材料进行了表征.结果表明,不同沉淀剂对样品的性能有重要的影响.在控制其它条件一致的情况下,用分别以氨水和以碳酸铵做沉淀剂可得到高温老化后仍保持高比表面积,储氧性能稳定的储氧材料;用(NH4)2CO3和NH3·H2O做混合沉淀剂所制得的储氧材料,其抗老化性能较差.3种不同沉淀剂所制备的储氧材料均可形成结构为四方晶相的CeO2-ZrO2固溶体,材料的还原性取决于比表面积,但与储氧性能无直接关系.

参考文献

[1] Di Monte R.;Graziani M.;Kaspar J.;Fornasiero P. .Oxygen storage and catalytic NO removal promoted by CeO2-containing mixed oxides[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(0):877-885.
[2] Hyun-Seog Roh;Ki-Won Jun;Wen-Sheng Dong;Jong-San Chang;Sang-Eon Park;Yung-Il Joe .Highly active and stable Ni/Ce-ZrO_2 catalyst for H_2 production from methane[J].Journal of molecular catalysis, A. Chemical,2002(1/2):137-142.
[3] Christine Bozo;Nolven Guihaume;Jean-Marie Herrmann .Role of the Ceria-Zirconia Support in the Reactivity of Platinum and Palladium Catalysts for Methane Total Oxidation under Lean Conditions[J].Journal of Catalysis,2001(2):393-406.
[4] Chopin Thierry .Zirconium/cerium mixed catalyst/catalyst support compositions having high/stable specific surfaces[P].U S Patent, 5607892,1994.
[5] Mamontov E.;Egami T. .Structural defects in a nano-scale powder of CeO2 studied by pulsed neutron diffraction[J].The journal of physics and chemistry of solids,2000(8):1345-1356.
[6] Yun-feng Chang;Jon G Mc Carty .Novel oxygen storage compounds for advanced catalysts for emission control in natural gas fuesed vehicles[J].Catalysis Today,1996,30(1-3):163-170.
[7] Cuif. Cerum oxides, zirconium oxides, Ce/Zr mixed oxides and Ce/Zr solid solutions having improved thermal stability and oxygen storage capacity[P].U S Patent, 6133194,2000.
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