化工进展 ›› 2020, Vol. 39 ›› Issue (11): 4446-4455.DOI: 10.16085/j.issn.1000-6613.2020-0105

• 工业催化 • 上一篇    下一篇

生物质焦油衍生氮掺杂多孔碳负载Co3O4纳米晶的制备及双功能氧反应催化

李德念1,2,3,4(), 陈会兵1,3,4,5(), 阳济章1,3,4, 袁浩然1,2,3,4,5(), 陈勇1,2,3,4,5   

  1. 1.中国科学院广州能源研究所,广东 广州 510640
    2.南方海洋科学与工程广东省实验室(广州), 广东 广州 510640
    3.中国科学院可再生能源重点实验室,广东 广州 510640
    4.广东省新能源和可再生能源研究开发与 应用重点实验室,广东 广州 510640
    5.常州大学,江苏 常州 213164
  • 出版日期:2020-11-05 发布日期:2020-11-06
  • 通讯作者: 袁浩然
  • 作者简介:李德念(1987—),男,博士,副研究员,研究方向为有机废物资源化利用。E-mail:lidn@ms.giec.ac.cn|陈会兵(1995—),男,硕士研究生,研究方向为电分析化学。E-mail:171363452@qq.com
  • 基金资助:
    国家重点研发计划(2018YFC1901200);国家自然科学基金(51806226);广东省自然科学基金(2019A1515011570);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0101)

Biomass tar-derived carbon doped with nitrogen to load Co3O4 nanocrystals as efficient bifunctional catalyst for oxygen reduction and evolution

Denian LI1,2,3,4(), Huibing CHEN1,3,4,5(), Jizhang YANG1,3,4, Haoran YUAN1,2,3,4,5(), Yong CHEN1,2,3,4,5   

  1. 1.Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
    2.Southern Ocean Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510640, Guangdong, China
    3.Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
    4.Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, Guangdong, China
    5.Changzhou University, Changzhou 213164, Jiangsu, China
  • Online:2020-11-05 Published:2020-11-06
  • Contact: Haoran YUAN

摘要:

以生物质焦油活化多级孔碳为骨架,通过一步水热合成同时实现氮掺杂和Co3O4纳米粒子负载,获得Co3O4@N/C复合催化剂。对比研究结果表明,凭借复合材料中活性Co3O4和N掺杂结构之间的协同效应,Co3O4@N/C复合催化剂对氧还原(ORR)和析氧反应(OER)均表现出较高的催化活性,ORR和OER启动电位电势差ΔE为0.99V;其中,ORR极限扩散电流密度为-5.10mA/cm2,与贵金属Pt/C相当。此外,Co3O4@N/C具有优异的氧还原稳定性,在经3000次循环伏安法扫描后,Co3O4@N/C的极限扩散电流密度仍能保持89.9%。这一生物质焦油衍生碳所构筑的N掺杂多孔碳负载Co3O4纳米晶复合材料在燃料电池和金属空气电池等领域具有巨大的应用潜力。

关键词: 生物质焦油, 水热, 燃料电池, 电化学, 催化

Abstract:

Composite catalyst of nitrogen-doped meso-microporous carbon loaded with Co3O4 nanocrystals (Co3O4@N/C) was facilely prepared by a one-step hydrothermal process from the biomass tar-derived carbon matrix. The Co3O4@N/C composite exhibited excellent bifunctional catalytic activity toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) due to the synergistic effect between the nitrogen-doped structure and the Co3O4 nanocrystals. The onset potential gap ΔE between ORR and OER was 0.99V and the limiting diffusion current density was -5.10mA/cm2, comparable to that of the Pt/C catalyst. Furthermore, the limiting diffusion current density of the Co3O4@N/C remained 89.9% of the initial value even after 3000cycles of CV scanning, manifesting the excellent long-term stability. The prepared composite presented great potential as a novel high-performance catalyst for fuel cells and metal-air batteries toward efficient and sustainable energy storage.

Key words: biomass tar, hydrothermal, fuel cells, electrochemistry, catalysis

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