| 氧化态、还原态多组元贵金属尾气净化催化剂催化性能的研究 |
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| 引用本文： | 旷成秀,李凤仪.氧化态、还原态多组元贵金属尾气净化催化剂催化性能的研究[J].贵金属,2007,28(1):32-36. |
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| 作者姓名： | 旷成秀 李凤仪 |
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| 作者单位： | 1. 九江学院,化学化工学院,江西,九江,332005
2. 南昌大学,应用化学研究所,江西,南昌,330047 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 应用微反应装置研究了Pt-Pd/Al2O3和Pt-Rh-Pd/Al2O3催化剂的氧化态和还原态的催化活性,对催化剂进行了XRD、TPD、TPR表征,并对反应机制进行了探讨.结果表明,在氧化态和还原态Pt-Pd/Al2O3催化剂中,氧化态Pt-Pd/Al2O3催化剂的催化氧化性能优于还原态Pt-Pd/Al2O3催化剂,且具有相同的催化机制;在氧化态和还原态Pt-Rh-Pd/Al2O3催化剂中,氧化态Pt-Rh-Pd/Al2O3催化剂的催化氧化性能不如还原态Pt-Rh-Pd/Al2O3催化剂,主要是由不同的催化机制所引起的;氧与贵金属的结合不利于NO的还原.
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| 关 键 词： | 金属材料 贵金属 氧化态和还原态 催化剂 |
| 文章编号： | 1004-0676(2007)01-0032-05 |
| 修稿时间： | 2006-03-12 |
Study on Catalytic Activities of Oxidized or Reduced Polycomponenet Noble Metals Auto-catalysts |
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| KUANG Chengxiu,LI Fengyi.Study on Catalytic Activities of Oxidized or Reduced Polycomponenet Noble Metals Auto-catalysts[J].Precious Metals,2007,28(1):32-36. |
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| Authors: | KUANG Chengxiu LI Fengyi |
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| Affiliation: | 1. Department of Chemistry and Chemical Engineering, Jiujiang University, Jiujiang, Jiangxi 332005, China; 2. Institute of Applied Chemistry, Nanchang University, Nanchang, Jiangxi 330047, China |
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| Abstract: | Catalytic activities of oxidized Pt-Pd/Al2O3 and reduced Pt-Pd/Al2O3 catalysts, oxidized Pt-Rh-Pd/Al2O3 and reduced Pt-Rh-Pd/Al2O3 catalysts were studied with flow-system micro reactor. All these catalysts were characterized by TPD, XRD and TPR and their catalytic mechanisms were discussed. The results showed that oxidation activity of oxidized Pt-Pd/Al2O3 catalyst is superior to that of reduced Pt-Pd/Al2O3 catalyst, and they have the same catalytic mechanism. The oxidation activity of oxidized Pt-Rh-Pd/Al2O3 catalyst is not as good as that of reduced Pt-Rh-Pd/Al2O3 catalyst, which is attributed to their different catalytic mechanisms. Noble metals combined with oxygen are harmful to the reduction activities. |
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| Keywords: | metal materials noble metals oxidized and reduced catalyst |
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