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N, P-dual doped carbon with trace Co and rich edge sites as highly efficient electrocatalyst for oxygen reduction reaction

具有痕量钴掺杂且暴露更多边缘活性的N,P共掺杂的多孔碳纳米片作为高效氧还原催化剂

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Abstract

Oxygen reduction reaction (ORR) is key to fuel cells and metal-air batteries which are considered as the alternative clean energy. Various carbon materials have been widely researched as ORR electrocatalysts. It has been accepted that heteroatom doping and exposure of the edge sites can effectively improve the activity of carbon materials. In this work, we used a simple method to prepare a novel N, P-dual doped carbon-based catalyst with many holes on the surface. In addition, trace level Co doping in the carbon material forming Co–N–C active species can further enhance the ORR performance. On one hand, the doping can adjust the electronic structure of carbon atoms, which would induce more active sites for ORR. And on the other hand, the holes formed on the surface of carbon nanosheets would expose more edge sites and can improve the intrinsic activity of carbon. Due to the heteroatom doping and the exposed edge sites, the prepared carbon materials showed highly excellent ORR performance, close to that of commercial Pt/C.

摘要

本文使用有机分子配位聚合作用一步聚合、 碳化、 酸洗得到了一种N,P双掺杂碳材料. 其具有痕量掺杂的金属钴、 且具有更多活性边缘. X射线光电子能谱显示杂原子成功进入碳材料当中, 并且发现酸洗后钴的信号非常低, 证明酸洗后, 材料表面形成非常多的孔, 暴露出更多的边缘催化位点. 制备的碳材料具有大量催化活性位点, 因此表现出极其优异的电催化氧还原性能. 另外, 与Pt/C相比, 制备的多孔碳材料还具有较好的抗毒性与稳定性, 进一步显示了其在新能源电池领域的应用前景.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (21701043, 21573066, and 51402100), the Provincial Natural Science Foundation of Hunan (2016JJ1006 and 2016TP1009), the Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province and Shenzhen Science and Technology Program (JCYJ20170306141659388).

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Correspondence to Shuangyin Wang  (王双印).

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Dafeng Yan received his BSc degree in 2014 from the Department of Chemistry, Hunan University, China. He is currently pursuing his PhD degree under the supervision of Prof. Shuangyin Wang. His current interests include the synthesis and characterization of nanomaterials with various defects and the relationship between the defects and the electrocatalytic performance of renewable energy-related reactions.

Shuangyin Wang received his BSc degree in 2006 from Zhejiang University and PhD in 2010 from Nanyang Technological University, Singapore. He was a postdoctoral fellow working with Prof. Liming Dai (2010–2011) and Prof. A. Manthiram (2011–2012). He is currently a Professor of Hunan University. His research interests are in novel carbon catalysts, defects in various crystals and their application on electrocatalysis and batteries.

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40843_2017_9174_MOESM1_ESM.pdf

N, P-Dual Doped Carbon with Trace Co and Rich Edge Sites As Highly Efficient Electrocatalyst for Oxygen Reduction Reaction

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Yan, D., Guo, L., Xie, C. et al. N, P-dual doped carbon with trace Co and rich edge sites as highly efficient electrocatalyst for oxygen reduction reaction. Sci. China Mater. 61, 679–685 (2018). https://doi.org/10.1007/s40843-017-9174-1

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