Abstract
Cyclopentazolate anions (cyclo-N5−) have been receiving ever-increasing attention as component of energetic explosives since recent fulfilment of the first stable sample in solid phase and ambient conditions. Herein, we present a new strategy to utilize deflagration reactions of cobalt pentazolate in combination with explosive poly(ionic liquid) (EPIL) for the preparation of Co@N-doped carbon materials with homogeneously distributed cobalt nanoparticle encapsulated by the layers of N-doped carbon sheets. The resultant 5%Co (N5)2-EPIL-900 exhibits high electrocatalytic activities, excellent stability and tolerance to CH3OH towards oxygen reduction reaction (ORR). Moreover, the present approach provides a novel routine for preparation of functional materials from energetic and newly-emerging cyclo-N5−-derived compounds.
摘要
自首例含有五唑阴离子(cyclo-N5−)的稳定固态聚氮化合物被报道以来, 探索新兴五唑化合物的制备与应用吸引着科学家们的极大兴趣. 本文发展了一种以五唑化钴与含能聚离子液体为前驱体, 利用独特的爆燃反应制备钴修饰氮掺杂碳材料的新方法. 凭借前驱体的含能特性, 所得材料具有典型的核-壳纳米结构, 氮掺杂碳层包裹的钴纳米颗粒分布均匀. 材料5%Co(N5)2-EPIL-900在氧还原反应中展现出优异的电催化性能、稳定性和抗甲醇毒化能力. 本工作为以含能五唑化合物为前驱体高效制备功能碳材料提供了新途径.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (21703218 and 21875228), and Shenzhen Science and Technology Innovation Committee (JCYJ20151013162733704).
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Author contributions Zhang Q and Zhang J proposed the research and guided the whole project. Wang B and Liu Y performed the main experiments and wrote the manuscript. Deng M, Luo J, Yang G and Zhang S helped analyze the data. All authors contributed to the general discussion.
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Conflict of interest The authors declare that they have no conflict of interest.
Binshen Wang completed his PhD in 2016 at East China Normal University. From 2016 to 2018, he worked as a postdoctoral fellow at the Institute of Chemical Materials (ICM), China Academy of Engineering Physics (CAEP). Now he is a postdoctoral fellow at Harbin Institute of Technology (Shenzhen). His research interest focuses on the synthesis of advanced energy materials.
Yousong Liu received his PhD from Nanjing University of Aeronautics and Astronautics in 2015. From 2016 to 2018, he worked as a postdoctoral fellow at ICM, CAEP. Now he is an associate professor in ICM. His research interest focuses on the synthesis of doped carbon materials via energetic materials deflagration.
Jiaheng Zhang obtained his PhD from China Agricultural University in 2013. From 2012 to 2015, he was a visiting scholar at the University of Idaho, and subsequently, he was a postdoctoral fellow. He was awarded the prestigious Japan Society for Promotion of Science (JSPS) fellowship at Yokohama National University in 2015. In 2016, he started to carry out independent research at Harbin Institute of Technology (Shenzhen). His research interests include ionic liquid chemistry and energetic materials.
Qinghua Zhang received his PhD from Lanzhou Institute of Chemical Physics in 2008. From 2010 to 2012, he worked as a CNRS associate researcher at the University of Poitiers, France. From 2012 to 2013, he worked as a postdoctoral fellow at the University of Idaho, USA. Now he is a professor at the Institute of Chemical Materials, China Academy of Engineering Physics. His research interest focuses on the synthesis of new high-energy-density materials, polynitrogen compounds, and energetic ionic liquids.
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Wang, B., Liu, Y., Deng, M. et al. From energetic cobalt pentazolate to cobalt@nitrogen-doped carbons as efficient electrocatalysts for oxygen reduction. Sci. China Mater. 62, 1403–1411 (2019). https://doi.org/10.1007/s40843-019-9459-2
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DOI: https://doi.org/10.1007/s40843-019-9459-2