Nanomagnetic CoPt truncated octahedrons: facile synthesis, superior electrocatalytic activity and stability for methanol oxidation
Nanomagnetic CoPt truncated octahedrons: facile synthesis, superior electrocatalytic activity and stability for methanol oxidation
复制标题
纳米磁性CoPt截角八面体：合成简便、对甲醇氧化具有优异的电催化活性和稳定性
DOI：
10.1007/s40843-016-5139-y
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
R. M. Wang
中科院分区：
文献类型：
--
作者：
T. Y. Xia;J. L. Liu;S. G. Wang;C. Wang;Y. Sun;R. M. Wang
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.摘要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8 nm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8 nm大小的CoPt纳米截角八面体的居里温度高达350 K, 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.
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