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	高耐甲醇性和稳定性的纳米复合阴极催化剂(英文); Nanocomposite Cathode Catalyst with High Methanol Tolerance and Durability
	郑宁 ; 朱春梅 ; 孙斌 ; 施祖进 ; 刘岩 ; 王远
	2012
关键词	纳米复合催化剂 氮杂化碳纳米角 酞菁 稳定性 耐醇性 直接甲醇燃料电池阴极 Nanocomposite catalyst Nitrogen-doped carbon nanohorn Phthalocyanine Durability Methanol tolerance Cathode of direct methanol fuel cell
英文摘要	报导了一种由酞菁氧钛、铂金属纳米簇和氮杂化碳纳米角结构基元组装而成的新型纳米复合电化学催化剂(TiOPc-Pt/NSWCNH)的制备、表征及电催化性能.在TiOPc-Pt/NSWCNH催化剂中,氮杂化碳纳米角堆积形成多孔导电网络,铂纳粒子均匀地分散于上述多孔导电网络中,部分铂纳粒子与TiOPc微晶直接接触.在甲醇存在的条件下,TiOPc-Pt/NSWCNH对氧还原反应表现出高催化活性和优良的选择性与稳定性.在甲醇浓度为0.5mol·L-1的高氯酸水溶液中,TiOPc-Pt/NSWCNH催化氧还原反应的起始电位比商购Pt/C-JM催化剂提高了260mV,其质量活性和比活性(0.85V(参比电极为...; We report the preparation, characterization, and electrocatalytic properties of a novel nanocomposite cathode catalyst (TiOPc-Pt/NSWCNH), which was assembled using Pt nanoclusters, TiOPc nanocrystal, and nitrogen-doped single walled carbon nanohorns (NSWCNHs) as building blocks. TiOPc-Pt/NSWCNH was characterized by inserting Pt nanoparticles in nano-networks formed by stacked NSWCNHs, and connecting some of the Pt nanoparticles with TiOPc nanocrystals. TiOPc-Pt/NSWCNH exhibits high electrocatalytic activity, excellent selectivity, and good durability for the oxygen reduction reaction (ORR) in the presence of methanol. In an O-2-saturated HClO4 aqueous solution containing methanol (0.5 mol.L-1), the onset potential over the TiOPc-Pt/NSWCNH catalyst shifted by more than +260 mV relative to that over a commercial Pt/C-JM catalyst. The mass activity and specific activity for the ORR over TiOPc-Pt/NSWCNH at 0.85 V (versus a reversible hydrogen electrode (RHE)) were 83.5 A . g(-1) and 0.294 mA . cm(-2), respectively. These results are much higher than those for Pt/C-JM. Cyclic voltammetry accelerated aging tests (0.6-1.0 V for 15000 cycles) in an O-2-saturated HClO4 aqueous solution containing methanol revealed that TiOPc-Pt/NSWCNH had higher durability than TiOPc-Pt/C. The high methanol tolerance of TiOPc-Pt/NCNH may be mainly derived from electron transfer from TiOPc nanocrystals to Pt nanoparticles. The nano-network and the high graphitization degree of the NSWCNHs are responsible for the excellent durability of TiOPc-Pt/NSWCNH.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000310181300005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 2; 10; 2263-2268; 28
语种	中文
出处	万方 ; 知网 ; SCI
出版者	物理化学学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/79725]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	郑宁,朱春梅,孙斌,等. 高耐甲醇性和稳定性的纳米复合阴极催化剂(英文), Nanocomposite Cathode Catalyst with High Methanol Tolerance and Durability. 2012-01-01.

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