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The thermal stability of ALD ZrO 2 -Pt/NCNT catalysts with different ALD cycles of ZrO 2 was studied by subjecting the samples to calcination at temperatures of 400 and 600 ¡ãC for 2 h.For ALD20ZrO2 -Pt/NCNT, the average size of Pt NPs increased from 1.8 nmto about 3.6 nm and 4.2 nm at 400 and 600 ¡ãC for 2 h, respectively. The average size of Pt NPs increasedslightly to 2.3 and 2.7 nm for ALD 30ZrO2 -Pt/NCNT at 400 and 600 ¡ãC, respectively. For ALD50ZrO2 -Pt/NCNT, however, the supported Pt NPs were successfully stabilized up to 600 ¡ãC, as demonstrated by retaining theiraverage particle size of 2.0 nm. ÏÈÀûÓÃALDÔÚµª²ôÔÓµÄ̼ÄÉÃ×¹ÜÉϳÁ»ýPtÄÉÃ×Á£×Ó£¬È»ºóÀûÓÃÑ¡ÇøALD³Á»ý ZrO2£¬Ê¹ÆäÔÚPtÖÜΧÐγÉÄÉÃ×Áý£¬½«PtÎȶ¨×¡¡£50²ãZrO2¼´ÄÜʹPtÄÉÃ×Á£×Ó ÔÚ600¡æÏ±£³ÖÎȶ¨2h¡£ÓÉÓÚPtÄÉÃ×Á£×ÓµÄÎȶ¨ÐÔ£¬¸Ä´ß»¯¼ÁµÄ´ß»¯»îÐÔÓÐÁË ºÜ´óµÄÌáÉý¡£ ±ãÓÚ¸÷λ³æÓѸüºÃµÄÀí½âÎÄÏ×£¬Ìؽ«ÕýÎĺÍSupporting Information´ò°üÒ»ÆðÉÏ´«¡£ÌâÄ¿£ºExtremely Stable Platinum Nanoparticles Encapsulatedin a Zirconia Nanocage by Area-Selective Atomic LayerDeposition for the Oxygen Reduction Reaction Äê·Ý£º2015Äê ÀûÓÃALDÎȶ¨¹ó½ðÊôÄÉÃ×Á£×ÓÊÇÒ»¸ö·Ç³£ÓÐЧµÄÊֶΣ¬¶ÔÓÚ²»Í¬µÄ·´Ó¦Ìåϵ£¬¿ÉÑ¡Ôñ²»Í¬µÄÑõ»¯ÎïÒÔ¼°Ñ»·´ÎÊýÒÔÆ¥ÅäÏàÓ¦µÄ·´Ó¦Ìõ¼þ¡£ [ Last edited by »ð·ï°¿Ïè on 2015-12-4 at 13:46 ] |
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