| 担载铕催化剂氢还原的穆斯堡尔谱研究 |
| IN SITU MOSSBAUER SPECTROSCOPIC STUDY OF HYDROGEN REDUCTION OF SUPPORTED EUROPIUM CATALYSTS |
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| 摘要: 使用原位穆斯堡尔诺考察了γ-Al2O3,SiO2,TiO2和ZrO2等几种载体担载的氧化铕催化剂的还原性.非担载Eu2O3很难在H2中还原,而Eu2O3,与γ-Al2O3、SiO2和TiO2间存在着强相互作用,担载在这些载体上的Eu2O3,在773K左右H2中处理可有不同程度的还原,其还原度反映了相互作用的强弱,顺序为;Eu/γ-Al2O3>Eu/TiO2>Eu/SiO2>Eu/ZrO2,Eu/ZrO2不能在773K还原,表明了Eu2O3与ZrO2间较弱的相互作用. |
| 关键词: 担载铕催化剂 原位穆斯堡尔谱 还原 氧化物－氧化物相互作用 |
| 基金项目: 国家教委“跨世纪优秀人才基金” |
| Abstract: In situ Mossbauer speroscopy was used. to investigate the reduction behavior of some support such as γ-Al2O3, SiO2, TiO2 and ZrO2 supported curopium catalysts. Europium is an active clement and thus the unsupported Eu2O3 is hard to reduce in H2. However the strong interaction between Eu2O3 and γ-Al2O3, SiO2 and TiO2 facilitates the reduction of Eu2O3.The Eu2O3 supported on these supports can be reduced in H2 at about 773K. The reduction degree can be taken as the cxtent of imeractions between Eu2O3 and the supportS. It was found that the reduction degree follow the series as:Eu/γ-Al2O3 >Eu/TiO2 >Eu/SiO2 >Eu/Eu/ZrO2 catalysts can not be reduced in H2 at 773K, which indicates that the.intoraction between Eu2O3 and ZrO2 is weak. |
| Keywords: supported europium eatalyst in situ Mossbauer spectroscopy reduction oxide-oxide interaction |
| 投稿时间：1995-01-10 |
| 摘要点击次数: 1102 |
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| 沈俭一,关冰,夏元复,陈懿.担载铕催化剂氢还原的穆斯堡尔谱研究[J].无机化学学报,1995,11(4):429-433. |
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