Nanomagnetic CoPt truncated octahedrons:facile synthesis,superior electrocatalytic activity and stability for methanol oxidation  

室温铁磁性CoPt纳米截角八面体的简易合成及超高电催化特性表征（英文）

作　　者：Tianyu Xia Jialong Liu Shouguo Wang Chao Wang Young Sun Rongming Wang 夏田雨;刘家龙;王守国;王超;孙阳;王荣明(University of Science and Technology Beijing;Department of Physics,Beihang University;State Key Laboratory of Magnetism,Institute of Physics,Chinese Academy of Sciences(CAS))

机构地区：[1]University of Science and Technology Beijing, Beijing 100083, China [2]Department of Physics, Beihang University, Beijing 100191, China [3]State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences （CAS）, Beijing 100190, China

出　　处：《Science China Materials》2017年第1期57-67,共11页中国科学（材料科学（英文版）

基　　金：supported by the National Basic Research Program of China(2015CB921401);the National Instrument Program of China(2012YQ120048);the National Natural Science Foundation of China(51625101,51431009,51471183,51331002,51371015,11274371 and 11674023);the Instrument Development Program of Chinese Academy of Sciences(YZ201345);the Fundamental Research Funds for the Central Universities(FRF-BR-15-009B)

摘　　要：Nanomagnetic CoPt truncated octahedral nanoparticles （TONPs） were successfully synthesised through a facile one-pot strategy. These single crystal CoPt TONPs with an average size of about 8 nm exhibit excellent electrocatalytic performance of both activity and stability for methanol oxidation reaction （MOR）. The mass and specific activities of CoPt TONPs is 8 and 6 times higher than that of standard commercial Pt/C, respectively. After accelerated durability test （ADT）, the loss of electrochemical surface area （ECSA） for CoPt TONPs is only 18.5%, which is significantly less than that of commercial Pt/C （68.2%）, indicating that CoPt TONPs possess much better stability than commercial Pt/C in the prolonged operation. The Curie temperature of CoPt TONPs down to 8 nm is as high as 350 K with weak ferromagntism at room temperature （RT）, which is greatly valuable for recycling in the eletrocatalytic applications.本文通过简单的一步法成功制备出室温铁磁性CoPt纳米截角八面体.这种平均大小约为8nm的单晶CoPt截角八面体纳米结构在催化甲醇氧化反应时表现出优异的电催化活性及稳定性,其质量活性和相对比活性分别能够达到标准商业Pt/C催化剂的8倍及6倍.长时间加速稳定性测试结果表明,CoPt纳米截角八面体的电化学活性表面积仅损失了18.5%,而相同反应条件下的标准商业Pt/C电极却损失了68.2%.磁性分析发现,这些仅有8nm大小的CoPt纳米截角八面体的居里温度高达350K,并在室温下表现出较弱的铁磁性,这将更加有利于催化剂的回收再利用,在实际应用中具有较大的潜在价值.

关 键 词：truncated octahedral nanoparticles methanol oxida-tion reaction （MOR） accelerated durability test （ADT） ferro-magntism 

分 类 号：TB383.1[一般工业技术—材料科学与工程]