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Applied Catalysis AÎÄÕ½éÉÜ Au/PO43-/TiO2 and PO43-/Au/TiO2 Catalysts for CO Oxidation: Effect of Synthesis Details on Catalytic Performance Z. Ma, S. Brown, S.H. Overbury, S. Dai*, Applied Catalysis A: General (2007) in press. http://dx.doi.org/10.1016/j.apcata.2007.05.019 In Press, Accepted Manuscript, Available online 18 May 2007, ÕâÊÇÎÒÔÚÏðÊ÷Áë¹ú¼ÒʵÑéÊÒ×ö²©Ê¿ºóÆÚ¼ä׫дµÄµÚһƪ£¬µ«ÊÇÓÉÓÚÎҵĵڶþƪÎÄÕº͵ÚÈýƪÎÄÕÂÉó¸å³¬¼¶¿ì£¨Á½¸öÐÇÆÚºÍÒ»¸öÐÇÆÚ£©£¬×îºóÕâÆªÎÄÕÂÅŵ½µÚÈý¸ö·¢±í¡£ÕâÆªÎÄÕÂÀïÓÐÎÒºÜÉî¿ÌµÄÌå»á£¬ºÍÎҵĿÆÑÐÕÜѧ¡£ÎÞ»ú²ÄÁϺϳɹ¤×÷ÕßµÄд×÷·½·¨ÊǸæËß¶ÁÕßÔÚijһ¸öºÏ³ÉÌõ¼þϵõ½Ê״κϳÉÁËÒ»¸öÃÀ¹ÛµÄ²ÄÁÏ£»µ«ÊÇÎÒ×öΪһ¸ö´ß»¯¹¤×÷Õߣ¬ËùÐÀÉ͵Äд×÷·½·¨ÊDz»µ«¸æËß¶ÁÕßÔÚ×î¼ÑÌõ¼þϵõ½µÄ×î¼Ñ½á¹û£¬ÎÒÒ²Òª½²Çå³þÔÚÆäËüÌõ¼þÏ»áµÃµ½Ê²Ã´½á¹û¡£ÕâÆªÎÄÕµıí´ï˳ÐòºÍʵÑé½á¹û£¬ÕæÊµµØ·´Ó³ÁËÒ»ÖÖ·¢Õ¹µÄ¿ÆÑÐÇóÖª¹ý³Ì£ºÒ»¿ªÊ¼ÀϰåÌá³öÒ»¸ö¿ÆÑеã×Ó£¬ÓÉÓÚ×Ô¼ºÊDz©Ê¿ºó£¬²»µÃ²»ÈÏÕæÕÕ×Å×ö£¬µ«ÊÇÊÔÑé½á¹û·Ç³£²»ÀíÏ룻ÎÒÔø¾³¢ÊԱ任ÊÔÑé²ÎÊý£¬µ«ÊÇ´ß»¯Ð§¹ûµÄÌá¸ßÖ»ÊÇÒ»µãµã£»ºóÀ´ÎÒ»ùÓÚ¶ÔÓÚÕâЩʧ°ÜµÄʵÑéµÄÈÏʶ£¬ÖØÐ¸ıäÁË´ß»¯¼ÁÖÆ±¸µÄ·Ïߣ¬ÖÕÓÚÔڼзìÖÐÇóµÃÒ»ÏßÉú»ú¡£ÎÒд×÷µÄʱºò£¬¾ÍÌØÒâ°´ÕÕʧ°Üµ½³É¹¦µÄ˳ÐòдµÄ£¬Ç¿µ÷µÄÊǰ´ÕÕ³£¹æË¼Â·¸ù±¾µÃ²»µ½ºÃ½á¹û£¬µ«ÊÇÎÒͨ¹ý¶Ôʧ°ÜµÄÈÏʶ£¬ÖÕÓڵõ½Á˳ɹ¦¡£ ÆðÒò£º½ð´ß»¯Êǵ±½ñÈÈÃÅ¿ÎÌâ¡£ºÜ¶àÈË˵ËûÃǵĽð´ß»¯¼ÁÔÚÊÒÎÂÏÂÄÜÑõ»¯Ò»Ñõ»¯Ì¼£¬µ«ÊÇÄÇЩ´ß»¯¼Á¶¼ÊÇûÓо¹ý¸ßαºÉյ쬽ð´ß»¯¼ÁµÄÈÈÎȶ¨ÐÔÊÇËüÔÚʵ¼ÊÓ¦ÓÃÖеġ°Æ¿¾±¡±¡£±¾¿ÎÌâ×éÇ°ÃæÒ»¸ö²©ºó°Ñ½ð·ÅÔÚÑõ»¯îÑÉÏ£¬·¢ÏÖ500¶ÈÉÕ¹ýºó£¬»îÐԵͣ»µ«°Ñ½ð·ÅÔÚÄÉÃ×Á×ËáïçÉÏ£¬500¶ÈÉÕ¹ýºó»îÐԸߣ¬¸Ã¹¤×÷·¢±íÓڵ¹úÓ¦Óû¯Ñ§»áÖ¾¡£Òò´Ë£¬Àϰå½ÐÎÒ¿¼²ìÁ×ËữµÄÔØÌå¶Ô½ð´ß»¯µÄÓ°Ï죬ϣÍû¿´µ½500¶ÈÉÕ¹ýºó£¬»îÐÔ»¹ºÜ¸ß¡£ Ôڽ̿ÆÊéÖУ¬ÈËÃÇÏȰÑÑõ»¯ï¯ÁòËữ£¬È»ºóÔٷŰ׽𡣲¢ÇÒ£¬ÁòËữµÄÑõ»¯ï¯ÊDz»ÓÃÇåÏ´µÄ¡£µ«ÊÇÎÒ·¢ÏÖ£¬µ±°Ñ´«Í³µÄ½Ì¿ÆÊé·½·¨¡°ÒÆÖ²¡±µ½ÎÒµÄÐÂÌåϵµÄʱºò£¬´ß»¯¼Á¸ù±¾²»»îÆÃ£¡£¨ºóÀ´ÖªµÀ£¬ÕâÊÇÒòΪÈç¹ûÁ×ËữµÄÔØÌå²»ÇåÏ´£¬ÄÇôÔڷŻƽðµÄʱºòÁ×Ëá¾Í»áµôÏÂÀ´£¬½µµÍÁËpHÖµ£¬ÁíÍâûÓеôÏÂÀ´µÄÁ×Ëá»áÕ¼¾ÝÒ»Ñõ»¯Ì¼Ñõ»¯µÄ»îÐÔ룬ËùÒÔ²ÅûÓлîÐÔ¡£µ«ÊÇ£¬Ã»ÓÐ×öʵÑé֮ǰÕâЩÊÂÇéÊDz»ÖªµÀµÄ¡££© ÓÚÊÇÎҸĽøºÏ³É·½·¨£¬°ÑÁ×ËữµÄÑõ»¯îѳ¹µ×ÇåÏ´£¬Ï´È¥²ÐÁôµÄÁ×ËᣬȻºóÔÙ¸ºÔػƽ𣬽á¹û·¢ÏÖ500¶ÈÉÕ¹ýºó£¬Ð§¹û±È²»Á×ËữµÄºÃÒ»µã¡£ÎªÁËÈÃÀϰåÂúÒ⣬ÎÒ²»ÑáÆä·³µØ¸Ä±äÁËÁ×ËữζȺÍÁ×ËữºóµÄ±ºÉÕζȣ¬ÊÔÁË20¸ö´ß»¯¼Á£¬·¢ÏÖЧ¹ûÌá¸ßÒ»µãµã¡£ÕâÑù£¬Á½¸öÔ¹ýÈ¥ÁË¡£[×¢£ºÕâ¸ö¾ÍÊǵ±³õ¸ÕÉæ×ãÕâ¸ö¿ÎÌâËù×ßÈëµÄ¡°ÎóÇø¡±£¡Ò²¾ÍÊÇ˵£¬Èç¹ûЧ¹ûÌá¸ßÖ»ÊÇÎå¶È¡¢Ê®¶È£¬±¾¸Ã·ÅÆú£¬¶ø²»ÊÇÏêϤ¿¼²ì±ºÉÕζȡ¢¸ºÔØÁ¿µÄÓ°Ï죡] ÈÏʶµ½¸ºÔصÄÁ×Ëá¸ùÓв¿·Ý»áÔڷŻƽðµÄ¹ý³ÌÖеôÏÂÀ´£¬´Ó¶ø½µµÍÁËpHÖµ£¬ÎÒÈËΪµØÔڷŻƽðµÄ¹ý³ÌÖмÓÈëÇâÑõ»¯¼Ø°ÑpHÖµµ÷»ØÈ¥£¬½á¹û·¢ÏÖ´ß»¯»îÐÔÓÐÌá¸ß£¬µ«ÊÇ»¹ÊDz»ÀíÏë¡£ ¿ì¾øÍûʱ£¬Í»È»Ïëµ½£ºÎªÊ²Ã´Òª¾ÐÄàÓڽ̿ÆÊéÀíÂÛ£¿ÎªÊ²Ã´Ò»¶¨ÒªÏÈÁ×Ëữ£¬È»ºóÔٷŻƽð£¿ÎªÊ²Ã´²»ÄÜÏȰѻƽð·ÅÔÚÑõ»¯îÑÔØÌåÉÏ£¬È»ºóÔÙ·ÅÁ×Ëá¸ù£¿ÎÒ³¢ÊÔÁËһϣ¬½á¹û·¢ÏÖЧ¹ûÓÐÌá¸ß£¬µ«ÊÇ»¹ÊDz»¹»ÀíÏë¡£ ×îºó£¬ÎҰѻƽð·ÅÔÚÑõ»¯îÑÔØÌåÉÏ£¬ÓÃÇâÆø»¹ÔÁËÒÔºóÔÙ·ÅÁ×Ëá¸ù£¬´ïµ½ÁË×î¼ÑЧ¹û¡£ÕâÀïҪעÒâµÄÊÇ·ÅÁËÁ×Ëá¸ùÒÔºó±ØÐëÇåÏ´²ÅÄÜ´ïµ½×î¼ÑЧ¹û¡£²»ÇåÏ´ÊÇÎÞ´ß»¯»îÐԵġ£ ÓÚÊÇ£¬ÎÒÓÖ¶ÔÕ⼸ʮ¸ö´ß»¯¼Á×öÁËXRD±íÕ÷¡¢ÔªËØ·ÖÎö£¬ÓÃÀÂü¹âÆ×ºÍÔªËØ·ÖÎö±íÕ÷ÁËÁ×ËữµÄÔØÌ壬дÁËÎÄÕ¡£×îºó£¬µ±Àϰå°ÑÎÄÕÂÐÞ¸ÄÁËÒ»±é£¬Ëµ¿ÉÒÔͶ¸åµÄʱºò£¬ÎÒÓÖÏë³öÁËһЩʵÑ飬²¹³äÁËһЩʵÑ飬×îºó£¬µÚÆß¸öÔµײŰÑÎÄÕÂͶ³öÈ¥¡£ ÎÄÕÂͶ³öÈ¥Èý¸öÔºó£¬ÊÕµ½Éó¸åÈËÒâ¼û¡£Ò»¸öÉó¸åÈË˵ÊǺÃÎÄÕ£¬½¨ÒéСÐÞ¸Äºó·¢±í¡£ÁíÍâÒ»¸öÉó¸åÈËÌá³öһЩÉî¿ÌµÄÎÊÌ⣬ÏÔÈ»ÄǸöÉó¸åÈËÊǸö´óÈËÎ¿´ÎÊÌâºÜ͸³¹¡£Ëû²¢²»ÍƼö±¾ÎÄ·¢±í£¬ÀíÓÉÊDZíÕ÷²»³ä·Ö¡£ÁíÍâÓÉÓÚÎÒ±¨µÀÁ˼¸Ê®¸ö´ß»¯¼Á£¬Ã¿Ò»¸ö´ß»¯¼Á¶¼ÓÐÈß³¤µÄ´úºÅ£¬ÏÔµÃÌõÀí²»¹»Çå³þ£¬Éó¸åÈ˽¨ÒéÓÐЩÊý¾Ý·ÅÔÚ¸½Â¼Àï¡£±à¼²ÉÈ¡ÕÛÖÔ·¨£¬½¨Òé´óÐ޸ġ£¿´µ½Éó¸åÒâ¼û£¬ÎÒÏó±»½½ÁËһͰÀäË®£¬µÈÁËÈýÌì²Å´ÓÖнâÍѳöÀ´¡£ÓÚÊÇ£¬ÎÒ¸ù¾ÝÉó¸åÈ˵ÄÒâ¼û³¹µ×ÐÞ¸ÄÁËÎÄÕµıí´ï£¬Óøü¼ÓͨË×µÄÓïÑÔÃèÊö×îΪµäÐ͵ÄÊý¾Ý£¬Ö±½ØÁ˵±¡£Í¬Ê±£¬ÎÒÓÖ¸ù¾ÝÉó¸åÈËÒâ¼û²¹³äÁËһЩÊÔÑé£¬ÌØ±ðÊDz¹³äÁ˵ç×ÓÏÔ΢¾µÊµÑ飬ʹÎÄÕµĿÆÑ§ÐԺͳå»÷Á¦´ó´óÌá¸ß¡£ÕâÑù£¬»¨ÁËÒ»¸öÔÂʱ¼ä²Å°ÑÎÄÕÂÐ޸ĺᣲ¢ÇÒÔÚÖÂл²¿·ÝÕæ³ÏµØ¸ÐлÉó¸åÈ˵ļû½âºÍ¹±Ïס£½á¹û£ºÐ޸ĸåͶ³öÈ¥ÒԺ󣬱༿´ÁËһϣ¬Ö±½Ó½ÓÊÕ¡£ ÕâÆªÎÄÕµÄд×÷ÊÖ·¨ºÍÎÒµÄÁíÍâÁ½ÆªÓÐÇø±ð¡£Ç°ÎÄ¡°Au/MxOy/TiO2 catalysts for CO oxidation: promotional effect of main-group, transition, and rare-earth metal oxide additives, Z. 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Oxidation: Promotional Effect of Main-Group, Transition, and Rare-Earth Metal Oxide Additives Z. Ma, S.H. Overbury, S. Dai*, Journal of Molecular Catalysis A: Chemical (2007) in press. http://dx.doi.org/10.1016/j.molcata.2007.04.007 Low-Temperature CO Oxidation on Au/Fumed SiO2-based Catalysts Prepeared from Au(en)2Cl3 Precursor H.G. Zhu, Z. Ma, J.C. Clark, Z.W. Pan, S.H. Overbury, S. Dai*, Applied Catalysis A: General (2007) in press. http://dx.doi.org/10.1016/j.apcata.2007.04.004 |
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