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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

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Abstract

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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Acknowledgments

This work was 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, 11674023), the Instrument Development Program of Chinese Academy of Sciences (YZ201345), and the Fundamental Research Funds for the Central Universities (FRF-BR-15-009B).

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Authors and Affiliations

  1. University of Science and Technology Beijing, Beijing, 100083, China

    Tianyu Xia  (夏田雨), Shouguo Wang  (王守国) & Rongming Wang  (王荣明)

  2. Department of Physics, Beihang University, Beijing, 100191, China

    Tianyu Xia  (夏田雨), Jialong Liu  (刘家龙) & Rongming Wang  (王荣明)

  3. State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences (CAS), Beijing, 100190, China

    Tianyu Xia  (夏田雨), Shouguo Wang  (王守国), Chao Wang  (王超) & Young Sun  (孙阳)

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  1. Tianyu Xia  (夏田雨)
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  2. Jialong Liu  (刘家龙)
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  3. Shouguo Wang  (王守国)
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  5. Young Sun  (孙阳)
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  6. Rongming Wang  (王荣明)
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Correspondence to Shouguo Wang  (王守国) or Rongming Wang  (王荣明).

Additional information

Tianyu Xia received her master degree from the Capital Normal University in 2013. She is now a PhD student supervised by Prof. Shouguo Wang and RongmingWang in Beihang University. Her current research is focused on the synthesis and characterization of noble nanomaterials.

Shouguo Wang received his bachelor degree (1996) from Anhui University and PhD (2001) from the Institute of Solid State Physics, Chinese Academy of Sciences (CAS), respectively. From August 2001 to December 2007, he did his research at the National University of Singapore, Max-Planck-Institute of Microstructure Physics, and the Univerity of Oxford. At the end of 2007, he joined the State Key Laboratory of Magnetism, Institute of Physics-CAS. He moved to the School of Materials Science and Engineering, University of Science and Technology Beijing in January 2016. His research interests include the magnetism and magnetic materials, with a focus on the topological magnetism such as skyrmions, spintronics, and nanomagnetism.

Rongming Wang received his bachelor (1991) and masterʼs (1994) degrees in physics from Peking University and PhD (1997) in materials science from Beijing Institute of Aeronautical Materials (BIAM), China. He joined Peking University as an associate professor in 2002. He joined Beihang University as a professor of physics in 2005 and joined the University of Science and Technology Beijing in 2015. His research interests include the synthesis, atomic structure and properties of functional nanomaterials. He has co-authored over 160 peer reviewed papers and has a research H-index of 39.

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

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Xia, T., Liu, J., Wang, S. et al. Nanomagnetic CoPt truncated octahedrons: facile synthesis, superior electrocatalytic activity and stability for methanol oxidation. Sci. China Mater. 60, 57–67 (2017). https://doi.org/10.1007/s40843-016-5139-y

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