采用溶胶凝胶法制备一系列Rx Ce0.8-xZr0.2O2(R=Mg,Ca,Sr和Ba,x=0,0.1,0.2和0.3)催化剂,并用X射线衍射(XRD)、比表面积(BET)、扫描电镜(SEM)、氢气程序升温还原(H2-TPR)和程序升温氧化(TPO)等技术对催化剂进行表征,同时考察该系列催化剂催化碳烟燃烧活性.研究结果表明,Zr4+均能进入CeQ晶格中形成具有立方萤石结构的固溶体.在不同的接触条件下,样品Ba0.1 Ce0.7Zr0.z O2催化碳烟燃烧活性均最高.在一系列样品R.1Ce0.7Zr0.2Q中,催化剂与碳烟紧密接触条件下其催化碳烟燃烧时更能够反映出催化剂内在活性的大小,而松散接触时则更易受到接触条件的影响.
参考文献
| [1] | B. Giechaskiel;B. Alfoldy;Y. Drossinos.A metric for health effects studies of diesel exhaust particles[J].Journal of Aerosol Science,20098(8):639-651. |
| [2] | 陈志刚;于雷;陈丰;张玉珠;徐政.CuO/Ce1-xAlxO2催化剂的制备及其催化性能研究[J].材料导报,2013(20):48-51. |
| [3] | 邰晓曦;孙婧;程江;文秀芳;杨卓如.软模板法制备高比表面CeO2-ZrO2介孔结构材料及其表征[J].材料导报,2012(16):75-78,90. |
| [4] | 晏冬霞;王华;李孔斋;魏永刚;祝星;程显名.Ce_（1-x）Fe_xO_2复合氧化物的结构及其催化碳烟低温燃烧性能[J].物理化学学报,2010(2):331-337. |
| [5] | Laversin H;Courcot D;Zhilinskaya EA;Cousin R;Aboukais A.Study of active species of Cu-K/ZrO2 catalysts involved in the oxidation of soot[J].Journal of Catalysis,20062(2):456-464. |
| [6] | 朱艺;闫朝阳;赵明;李小双;龚茂初;陈耀强.锆含量对（CeMn）1-xZrxO2催化剂催化燃烧碳烟稳定性能的影响[J].高等学校化学学报,2013(2):394-400. |
| [7] | Yuechang Wei;Jian Liu;Zhen Zhao.Structural and synergistic effects of three-dimensionally ordered macroporous Ce_(0.8)Zr_(0.2)O2-supported Pt nanoparticles on the catalytic performance for soot combustion[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2013:250-261. |
| [8] | Guo Jiaxiu;Shi Zhonghua;Wu Dongdong;Yin Huaqiang;Gong Maochu;Chen Yaoqiang.A comparative study of SrO and BaO doping to CeO_2-ZrO_2: Characteristic and its catalytic performance for three-way catalysts[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,20132(2):495-503. |
| [9] | 王婷婷;谢其刚;洪燕霞;梁红;李树华.钾掺杂对铈锆固溶体催化性能的影响[J].环境工程学报,2012(6):2007-2011. |
| [10] | Atribak I;Bueno-Lopez A;Garcia-Garcia A.Combined removal of diesel soot particulates and NOx over CeO2-ZrO2 mixed oxides[J].Journal of Catalysis,20081(1):123-132. |
| [11] | Eleonora Aneggi;Carla de Leitenburg;Alessandro Trovarelli.On the role of lattice/surface oxygen in ceria-zirconia catalysts for diesel soot combustion[J].Catalysis Today,20121(1):108-115. |
| [12] | Leandro Fontanetti Nascimento;Renata Figueredo Martins;Rodrigo Ferreira Silva;Osvaldo Antonio Serra.Catalytic combustion of soot over ceria-zinc mixed oxides catalysts supported onto cordierite[J].环境科学学报（英文版）,2014(03):694-701. |
| [13] | Idriss Atribak;Franz E. Lopez-Suarez;Agustin Bueno-Lopez.New insights into the performance of ceria-zirconia mixed oxides as soot combustion catalysts. Identification of the role of "active oxygen" production[J].Catalysis Today,20111(1):404-408. |
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