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Effect of BaO on Catalytic Activity of Pt-Rh TWC 被引量：4

Effect of BaO on Catalytic Activity of Pt-Rh TWC
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摘要 The effects of BaO doping on the three-way catalytic activity of Pt-Rh catalyst and on water-gas shift were investigated. The results show that the light-off temperatures of hydrocarbon and carbon monoxide and nitrogen oxides of the fresh catalysts slightly differ from those of the aged catalysts, and the catalysts containing CeO2-ZrO2-BaO have lower lightoff temperature and better catalytic activity than these containing BaO and CeO2-ZrO2 after hydrothermal aging for 5 h at 1000 ℃. The catalysts were characterized by means of the temperature-programmed reduction （TPR） in hydrogen and the temperature-programmed desorption （TPD） in oxygen. It is confirmed that the suggested route of CeO2-ZrO2-BaO by coprecipitation can improve the catalytic activity of catalysts. The effects of BaO doping on the three-way catalytic activity of Pt-Rh catalyst and on water-gas shift were investigated. The results show that the light-off temperatures of hydrocarbon and carbon monoxide and nitrogen oxides of the fresh catalysts slightly differ from those of the aged catalysts, and the catalysts containing CeO2-ZrO2-BaO have lower lightoff temperature and better catalytic activity than these containing BaO and CeO2-ZrO2 after hydrothermal aging for 5 h at 1000 ℃. The catalysts were characterized by means of the temperature-programmed reduction （TPR） in hydrogen and the temperature-programmed desorption （TPD） in oxygen. It is confirmed that the suggested route of CeO2-ZrO2-BaO by coprecipitation can improve the catalytic activity of catalysts.
作者 郭家秀 龚茂初 袁书华 陈耀强
机构地区 College of Chemistry
出处 《Journal of Rare Earths》 SCIE EI CAS CSCD 2006年第5期554-559,共6页 稀土学报（英文版）
基金 Project supported by the National Natural Science Foundation of China (20273043) the National Nature Science KeyFoundation of China (20333030)
关键词 BAO Pt-Rh three-way catalysts H2-TPR O2-TPD rare earths BaO Pt-Rh three-way catalysts H2-TPR O2-TPD rare earths
分类号 O643.36 [理学—物理化学]
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参考文献11

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Journal of Rare Earths
2006年 第5期

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