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首页> 外文期刊>Materials Science and Engineering >Promotional effect of alkyl acids on thermal stability of nanostructured CeO_2-ZrO_2-Y_2O_3-La_2O_3 and its application in automotive three-way catalysts
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Promotional effect of alkyl acids on thermal stability of nanostructured CeO_2-ZrO_2-Y_2O_3-La_2O_3 and its application in automotive three-way catalysts

机译：烷基酸对CeO_2-ZrO_2-Y_2O_3-La_2O_3纳米结构热稳定性的促进作用及其在汽车三效催化剂中的应用

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摘要

A series of nanostructured CeO_2-ZrO_2-Y_2O_3-La_2O_3 quaternary solid solutions (CZ-C10, CZ-C12, CZ-C14 and CZ-C16) were synthesized by simultaneous co-precipitation method with the assistance of alkyl acids C_nH_(2n+1)COOH (n = 9, 11, 13 and 15). The obtained materials exhibit greatly enhanced oxygen storage capacity, textural properties and thermal stability. After aging at 1000 ℃, CZ-C12-a presents a high surface area of 47 m~2 g~(-1) and a large cumulative pore volume of 0.28 mL g~(-1). A comparison between CZ-C12 and the commercial material SO-2 in terms of the catalytic performance of supported Rh-only three-way catalysts indicates that Rh/CZ-C12 owns significantly higher catalytic activity than Rh/SO-2. After aging at 1050 ℃ for 12 h, the light-off temperatures (T_(50)) of C_3H_8, CO and NO for Rh/CZ-C12-a are 314 ℃, 263 ℃ and 322 ℃, respectively, which are much lower than those (360 "C, 290 ℃ and 386 ℃) for Rh/SO-2-a.
机译：通过同时共沉淀法，在烷基酸C_nH_（2n + 1）的辅助下，合成了一系列纳米结构的CeO_2-ZrO_2-Y_2O_3-La_2O_3四元固溶体（CZ-C10，CZ-C12，CZ-C14和CZ-C16） COOH（n = 9、11、13和15）。所获得的材料显示出大大增强的储氧能力，质地特性和热稳定性。 CZ-C12-a在1000℃时效后，具有47 m〜2 g〜（-1）的高表面积和0.28 mL g〜（-1）的大累积孔体积。 CZ-C12和市售材料SO-2在仅担载Rh的三元催化剂的催化性能方面的比较表明，Rh / CZ-C12的催化活性明显高于Rh / SO-2。在1050℃老化12小时后，Rh / CZ-C12-a的C_3H_8，CO和NO的起燃温度（T_（50））分别为314℃，263℃和322℃，这要低得多。高于Rh / SO-2-a的那些（360℃，290℃和386℃）。

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  • 来源
    《Materials Science and Engineering》 |2017年第11期|10-19|共10页
  • 作者

    Yi Zhou; Xiaoqian Cheng; Shanahan Li; Lei Xiong; Shuang Yan; Jianli Wang; Yaoqiang Chen;

  • 作者单位

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

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

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

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

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

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

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

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanostructure; Solid solution; Thermal stability; Alkyl acid; Rh-only three-way catalyst;

    机译：纳米结构实在的方法;热稳定性;烷基酸仅Rh的三元催化剂;

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