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| 催化碳烟氧化用PtCexZr1-xO2催化剂的制备及性能研究 |
| Study on preparation and performance of PtCexZr1-xO2 catalysts for soot oxidation |
| 投稿时间：2020-04-14 |
| DOI： |
| 中文关键词: 催化化学 Pt-Ce-Zr催化剂 一步法 碳烟低温氧化 |
| 英文关键词: catalyst chemistry Pt-Ce-Zr catalyst one-pot synthesis soot low-temperature oxidation |
| 基金项目:云南省应用基础研究计划项目青年项目(2017FD213)；国家重点研发计划子课题(2017YFC0211304) |
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| 摘要点击次数: 1192 |
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| 中文摘要: |
| 采用水热晶化法一步制备了铈锆摩尔比不同的PtCexZr1-xO2系列催化剂，测定其比表面积、储氧量、氢气还原温度等物化性能参数，并进行结构表征，研究催化剂组成中铈锆摩尔比(nCe/nZr)对催化剂结构和性能的影响。结果表明，当nCe/nZr=5:5时，制备得到的PtCe0.5Zr0.5O2催化剂晶粒尺寸最小，储氧量较高，氢气还原温度低，微观结构为四方相和立方相2种晶型结构并存的固溶体。与传统贵金属浸渍负载方法制备的Pt/Ce0.5Zr0.5O2催化剂相比较，水热晶化法一步制备的PtCe0.5Zr0.5O2催化剂对碳烟的低温氧化具有更优的催化活性。 |
| 英文摘要: |
| A series ofPtCexZr1-xO2 catalysts were prepared by one-step hydrothermal crystallization method. The influences of the molar rate of Ce and Zr (nCe/nZr) on physical and chemical properties of the catalysts were investigated by specific surface area, oxygen storage capacity, reduction temperature test and X-ray diffractometer methods. The results showed that the catalyst with a ratio of nCe/nZr=5:5 had the smallest grain size, higher oxygen storage capacity, lower reduction temperature, and that the microstructure was solid solution nanoparticles with tetragonal and cubic phases. Compared with the Pt/Ce0.5Zr0.5O2 catalyst prepared by a traditional method, the PtCe0.5Zr0.5O2 catalyst prepared by one-step hydrothermal crystallization method had better catalytic activity for soot low-temperature oxidation. |
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