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首页> 外文期刊>Journal of power sources >Co,N-codoped graphene as efficient electrocatalyst for hydrogen evolution reaction: Insight into the active centre
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Co,N-codoped graphene as efficient electrocatalyst for hydrogen evolution reaction: Insight into the active centre

机译：Co，N掺杂的石墨烯作为氢释放反应的有效电催化剂：深入研究活性中心

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摘要

Co and N co-doped carbon (CNC) material is one of the most promising precious-metal-free catalyst for hydrogen evolution reaction (HER), however, widespread application of CNC will require continuous innovation and optimization of fabrication to maximize electrocatalytic performance, which is always a challenge. Herein, two types of three-dimensional (3D) graphene materials synthesized by one-step of simultaneous doping (Co,N/3DG-1) and two-step of sequential doping (Co,N/3DG-2) respectively, are evaluated and correlated their electrocatalytic activity for HER with experimental parameters. The results indicate that Co,N/3DG-2 exhibits significantly better electrocatalytic activity than Co,N/3DG-1. The structure analysis reveals that Co,N/3DG-2 has more moderate Co-N coordinated number than Co,N/3DG-1. Density functional theory calculations unravels that the equilibrium C and N around Co atom is more favorable to the adsorption and desorption of hydrogen. The results shed new light on the rational design of dual hetero-atom co-doped carbon materials, which may be applicable to other energy conversion and storage systems. (C) 2017 Elsevier B.V. All rights reserved.
机译：Co和N共掺杂碳（CNC）材料是最有前途的无氢析氢反应（HER）催化剂之一，但是，CNC的广泛应用将需要不断创新和优化制造工艺，以最大程度地发挥电催化性能，这总是一个挑战。在本文中，分别评估了通过一步同时掺杂（Co，N / 3DG-1）和两步连续掺杂（Co，N / 3DG-2）合成的两种三维（3D）石墨烯材料并将其对HER的电催化活性与实验参数相关联。结果表明，Co，N / 3DG-2的电催化活性明显优于Co，N / 3DG-1。结构分析表明，Co，N / 3DG-2比Co，N / 3DG-1具有中等的Co-N配位数。密度泛函理论计算表明，Co原子周围的C和N平衡更有利于氢的吸附和解吸。研究结果为双杂原子共掺杂碳材料的合理设计提供了新的思路，这可能适用于其他能量转换和存储系统。 （C）2017 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Journal of power sources》 |2017年第30期|260-268|共9页
  • 作者

    Wang Shumin; Zhang Lei; Qin Yong; Ding Dong; Bu Yunfei; Chu Fuqiang; Kong Yong; Liu Meilin;

  • 作者单位

    Changzhou Univ, Jiangsu Key Lab Adv Catalyt Mat & Technol, Sch Petrochem Engn, Changzhou 213164, Peoples R China;

    Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA;

    Changzhou Univ, Jiangsu Key Lab Adv Catalyt Mat & Technol, Sch Petrochem Engn, Changzhou 213164, Peoples R China;

    Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA;

    Changzhou Univ, Jiangsu Key Lab Adv Catalyt Mat & Technol, Sch Petrochem Engn, Changzhou 213164, Peoples R China;

    Changzhou Univ, Jiangsu Key Lab Adv Catalyt Mat & Technol, Sch Petrochem Engn, Changzhou 213164, Peoples R China;

    Changzhou Univ, Jiangsu Key Lab Adv Catalyt Mat & Technol, Sch Petrochem Engn, Changzhou 213164, Peoples R China;

    Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Co,N-codoped graphene; 3D graphene; Hydrogen evolution reaction; Active centre; Electrocatalyst;

    机译：Co;N共掺杂石墨烯;3D石墨烯;氢析出反应;活性中心;电催化剂;

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