孟玲.CexZr1-xO2 储氧材料制备方法研究进展[J].热喷涂技术,2021,13(2):85~94.
CexZr1-xO2 储氧材料制备方法研究进展
Research Progress on Synthesis ofthe CexZr1-xO2 Oxygen Storage Materials
  
DOI:10.3969/j.issn.1674-7127.2021.02.011
中文关键词:  储氧材料  CexZr1-xO2  储氧性能  改性掺杂
英文关键词:Oxygen Storage Materials  CexZr1-xO2  Oxygen storage capacity(OSC)  Modification of doping
基金项目:
  
作者单位
孟玲 矿冶科技集团有限公司
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中文摘要:
      本文综述了共沉淀法、 溶胶 - 凝胶法、 水热法、 高能球磨法等常用 CexZr1-xO2 储氧材料的合成方法, 并进 行了比较。 阐述了 CexZr1-xO2 的基本改性机制, 详述了稀土元素、 碱土元素以及过渡金属对 CexZr1-xO2 的改性效 果及原理。 相关研究结果表明, CexZr1-xO2 晶体结构、 形貌、 比表面积与其合成方法有很大关系, 从而影响其储 氧性能和热稳定性。 通过掺杂第三种元素与 CexZr1-xO2 形成三元固溶体能进一步改善其储氧性能和热稳定性, 从 而使 CO 和 HC 在还原条件下以及 NOx 在氧化条件下的转化率大大提高。 最后, 本文指出了 CexZr1-xO2 储氧材料 目前存在的问题和今后的研究方向。
英文摘要:
      In this paper, the synthesis method of CexZr1-xO2 oxygen storage materials has been summrised, including co-precipitation, sol-gel method, hydrothermal method, high energy ball-milling and some other methods. The comparisons of these preparation methods have been discussed. The basic modification mechanism of Ce xZr1-xO2 has been described. Meanwhile, the modification effect and principle of rare earth elements, alkaline earth elements and transition metals on Ce xZr1-xO2 has been elaborated. The relevant results showed that the crystal texture, morphology, BET surface area of CexZr1-xO2 were significantly influenced by the synthetic method, which affected the oxygen storage capacity and thermal stability. By doping the third element with CexZr1-xO2 to form ternary solid solution can further improve its oxygen storage performance and thermal stability, so that the ransformation rate of CO and HC under the reduction condition and NO x under the oxidation condition has been greatly improved. Finally, the existing problems and future research directions of CexZr1-xO2 oxygen storage materials has been pointed out.
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