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小童2133

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含Ce储氧材料的氧空缺密度与氧移动能力呈火山状的关系, 先随着氧空缺密度的增加而增加, 越过一个阈值后迅速降低。加入少量Mn会使氧化还原能力增加。继续掺杂Mn, 材料中氧空缺的密度超过阈值, 相互之间的作用力过强, 导致氧在材料体相中移动能力剧烈下降。
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pharmjackie

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小童2133(金币+5): 2010-03-22 11:29
含Ce储氧材料的氧空缺密度与氧移动能力呈火山状的关系, 先随着氧空缺密度的增加而增加, 越过一个阈值后迅速降低。加入少量Mn会使氧化还原能力增加。继续掺杂Mn, 材料中氧空缺的密度超过阈值, 相互之间的作用力过强, 导致氧在材料体相中移动能力剧烈下降
The density of oxygen vacancies  of Ce-containing oxygen storage materials is in a volcano-shaped relationship with oxygen mobility. It increases with the density of oxygen vacancies , crossing a threshold and rapidly decreases. Addition of a small amount of Mn increases the redox capacity, while further addition of  Mn resulted in a sharp decrease in the xygen mobility in the material phase due to strong interactions that rose from exceeding of density of oxygen vacancies in the material.
2楼2010-03-14 14:14:27
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