Effect of preferred orientation on catalytic properties of Ce-Fe-O film

择优取向对Ce-Fe-O薄膜催化性能的影响

• 批准号: 21760546
• 负责人: TU Rong
• 金额: $ 2.75万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21760546/
• 关键词: 新機能材料; 排ガス助触媒; セリア薄膜; 配向制御; レーザーCVD; 酸化鉄; 固溶体膜

CeO_2 has been applied as an promoter catalyst material due to its excellent oxygen storage capacity, which may be improved by a feather-like microstructure and(100)orientation. The oxygen storage capacity may be improved by a solid solution with the smaller transition metallic ions, e. g., Fe^<3+> : 0. 078 nm. In this study, Ce_<1-x> Fe_xO_<2-δ> solid solution films were prepared by laser chemical vapor deposition and the effects of laser power(P_L)and total pressure(P_<tot>)on the preferred orientation, microstructure and deposition rate were investigated. Non-oriented Ce_<1-x> Fe_xO_<2-δ> single phase films were prepared at P_<tot>=0. 8kPa and P_L=0-δ0W while(100)oriented films were prepared at P_L=δ0-1δ0W. The solubility of Fe_2O_3 in Ce_<1-x> Fe_xO_<2-δ> film was less than 0. 1δ. The highest deposition rate was 100μm/h. The(100)-oriented Ce_<1-x> Fe_xO_<2-δ> solid solution film had a feather-like microstructure, showing a high specific surface area.

CeO_2具有良好的储氧性能，其羽毛状的微观结构和（100）晶面取向可以改善CeO_2的储氧性能。固溶体中含有较小的过渡金属离子，可以提高储氧能力。例如，在一个实施例中，Fe^<3+>：0. 078 nm。本文<1-x>采用激光化学气相沉积法制备了Ce_ Fe_xO_（2-δ）固溶体薄膜，并研究了激光功率（PL）和总气压（P_<tot>）对薄膜的择优取向、显微结构和沉积速率的影响。在<1-x>P =0. 05时制备了无取向的Ce_ Fe_xO_&lt;2-δ&gt;单相薄膜<tot>。当P_L=δ0-1δ 0 W时，可制备出（100）取向的薄膜。Fe_2O_3在Ce_<1-x>Fe_xO_&lt;2-δ&gt;薄膜中的溶解度小于0. 1δ。最高沉积速率为100μm/h。Ce_<1-x>Fe_xO_（2-δ）固溶体薄膜为（100）取向的羽毛状结构，具有较高的比表面积。

项目成果

Influence of laser power on the orientation and microstructure of CeO_2 films deposited on Hastelloy C276 tapes by laser chemical vapor deposition

激光功率对哈氏合金C276带材激光化学气相沉积CeO_2薄膜取向和微观结构的影响

• 发表时间: 2010
• 期刊: Applied Surface Science
• 影响因子: 6.7
• 作者: Pei Zhao;Akihiko Ito;Rong Tu;Takashi Goto
• 通讯作者: Takashi Goto

Preparation of highly (100)-oriented CeO2 films on polycrystalline Al2O3 substrates by laser chemical vapor deposition

• DOI: 10.1016/j.surfcoat.2010.04.037
• 发表时间: 2010-08
• 期刊: Surface & Coatings Technology
• 影响因子: 5.4
• 作者: P. Zhao;A. Ito;R. Tu;T. Goto

High-speed epitaxial growth of(100)-oriented CeO_2 film on r-cut sapphire by laser chemical vapor deposition

激光化学气相沉积在R切蓝宝石上高速外延生长(100)取向CeO_2薄膜

• DOI: 10.1016/j.surfcoat.2011.02.062
• 发表时间: 2011
• 期刊: Surface and Coatings Technology
• 影响因子: 5.4
• 作者: P. Zhao;A. Ito;R. Tu;T. Goto
• 通讯作者: T. Goto

Highly (100)-oriented Ce_<1-x>Fe_xO_<2-δ> solid solution films prepared by laser chemical vapor deposition

激光化学气相沉积制备高(100)取向Ce_<1-x>Fe_xO_<2-δ>固溶体薄膜

• 发表时间: 2011
• 期刊: Thin Solid Films
• 影响因子: 2.1
• 作者: Jorge Roberto Vargas Garcia;Rong Tu;Takashi Goto
• 通讯作者: Takashi Goto

Highly(100)-oriented Ce_(1-x)Fe_xO_2-delta solid solution films prepared by laser chemical vapor deposition

激光化学气相沉积制备高(100)取向Ce_(1-x)Fe_xO_2-δ固溶体薄膜

• 发表时间: 2012
• 期刊: Thin Solid Films
• 影响因子: 2.1
• 作者: Jorge Roberto Vargas Garcia;Rong Tu and Takashi Goto
• 通讯作者: Rong Tu and Takashi Goto