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Сͯ2133(½ð±Ò+5): 2010-03-22 11:29
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º¬Ce´¢Ñõ²ÄÁϵÄÑõ¿ÕȱÃܶÈÓëÑõÒÆ¶¯ÄÜÁ¦³Ê»ðɽ״µÄ¹ØÏµ, ÏÈËæ×ÅÑõ¿ÕȱÃܶȵÄÔö¼Ó¶øÔö¼Ó, Ô½¹ýÒ»¸öãÐÖµºóѸËÙ½µµÍ¡£¼ÓÈëÉÙÁ¿Mn»áʹÑõ»¯»¹ÔÄÜÁ¦Ôö¼Ó¡£¼ÌÐø²ôÔÓMn, ²ÄÁÏÖÐÑõ¿ÕȱµÄÃܶȳ¬¹ýãÐÖµ, Ï໥֮¼äµÄ×÷ÓÃÁ¦¹ýÇ¿, µ¼ÖÂÑõÔÚ²ÄÁÏÌåÏàÖÐÒÆ¶¯ÄÜÁ¦¾çÁÒϽµ 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. |
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