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lisamos

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Solid solution of metal ions, by the substitution of metal ions (Fe3+ in Fe2+ framework for instance) to form the defect for the charge carriers, in order to incorporate O2- or H+ which is mobile in MOF framework.
question£º why it is possible to have O2- or H+ by use of Fe2+/Fe3+?
ÆäʵÉÏÃæÒ»¶ÎÓ¢ÎıíÊöºÍÎÊÌâµÄÒâ˼ÎÒҲû¸ãÃ÷°×£¬ËùÒÔ¶¼ÎÞ´ÓÏÂÊÖ¡£ÊÇÓйظßÎÂÏÂMOFµ¼µçÐԵġ£¾§ÌåȱÏÝ£¬¹ÌÈÜÌ壬×Ô¼º¾ÍһС°×£»ËùÒÔÕë¶ÔÉÏÃæµÄÎÊÌ⣬ϣÍû´ó¼Ò¸øµãÒâ¼û£¬Ð¡µÜ²»Ê¤¸Ð¼¤£¡£¡ÓÐÏà¹ØÎÄÏ׿ÉÒÔÍÆ¼öÏÂ×îºÃ~ÏÈллÁË
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qian1021

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Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
lisamos: ½ð±Ò+2, ÎÒ¾ÍÊǰïÄãÎ浀 2012-07-25 18:59:21
lisamos: ½ð±Ò+8 2012-07-25 21:06:48
½ðÊôÀë×ӵĹÌÈÜÌ壬ͨ¹ý½ðÊôÀë×ÓÌæ»»£¨Ïò¶þ¼ÛÌúµÄ¹Ç¼Ü½á¹¹ÖмÓÈëÈý¼ÛÌúΪÀý£©ÐγɵçºÉÔØÌåµÄȱÏÝ£¬½«O2- or H+ÒýÈëMOFÖв¢×ÔÓÉÒÆ¶¯¡£
ÎÊÌ⣺Ϊʲôͨ¹ý²»µÈ¼ÛÀë×ÓµÄÌæ»»¿ÉÒÔÓÐO2- or H+ÔڹǼÜÖÐ×ÔÓÉÒÆ¶¯¡£

I think it¡¯s because the generation of oxygen vacancies. (A large number of the ions of one species should be mobile. This requires a large number of empty sites, either vacancies or accessible interstitial sites.)
Lewis acidic ferrous ions have the potential to promote elimination of a proton from the coordination acid (Phosphorus oxoacids/phosphates), make the proton mobile in the oxygen vacancies. The O2- would be mobile in the the oxygen vacancies by inducing Fe2O3.
2Â¥2012-07-25 18:56:11
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