...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A ball-milling synthesis of N-graphyne with controllable nitrogen doping sites for efficient electrocatalytic oxygen evolution and supercapacitors
【24h】

A ball-milling synthesis of N-graphyne with controllable nitrogen doping sites for efficient electrocatalytic oxygen evolution and supercapacitors

机译：具有可控氮掺杂位点的N-Graphyne的球磨合成，用于高效电催化氧气进化和超级电容器

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Low-cost and efficient multifunctional electrodes play an important part in promoting the practical application of energy conversion and storage. Herein, we report the facile synthesis of N-graphyne, with a novel structure, by one-step ball milling of CaC(2)and pyrazine. The accurate doping of nitrogen atoms at the controllable sites of the molecular skeleton of gamma-graphyne was achieved using the nitrogenous precursor (pyrazine) as a reactant. Various techniques were adopted for the investigation of the composition, structure, and morphology of the obtained samples. The electrochemical measurements demonstrated that N-graphyne can serve as an excellent electrode material for both electrocatalysis and supercapacitors. As an electrocatalyst, N-graphyne exhibited an overpotential of 280 mV at 100 mA cm(-2)and a Tafel slope of 122 mV dec(-1)for the oxygen evolution reaction with highly stable morphology and electrocatalytic performance. As a supercapacitor electrode, N-graphyne showed a maximum capacitance of 235 F g(-1)at 1 A g(-1), and capacitance retention of 87% after 3000 cycles. The superior electrochemical performance of N-graphyne is due to the nitrogen heteroatomic defects, large electrochemical active surface areas and fast electron migration. Our studies provide a facile synthesis of novel N-graphyne with controllable doping sites and promote its potential applications in electrocatalysis and supercapacitors.
机译：低成本和高效的多功能电极在促进能量转换和储存的实际应用中起着重要组成部分。在此，通过CAC（2）和吡嗪的一步球碾磨，通过新颖的结构报告N-Graphyne的容易合成。使用含氮前体（吡嗪）作为反应物，实现了γ-石墨酰基的分子骨架的可控部位的氮原子的精确掺杂。采用各种技术来研究所得样品的组成，结构和形态。电化学测量表明，N-Graphyne可以用作电常放和超级电容器的优异电极材料。作为电催化剂，N-Graphyne在100mA cm（-2）下，在100 mA cm（-2）和122mV DEC（-1）的Tafel斜率，具有高度稳定的形态和电催化性能的氧化物斜率。作为超级电容器电极，N-graphyne在1Ag（-1）下显示出235f g（-1）的最大电容，并且在3000次循环后的87％的电容保持的电容保持。 n-graphyne的卓越电化学性能是由于氮杂原子缺陷，大电化学活性表面积和快速电子迁移。我们的研究提供了具有可控掺杂位点的新型N-Graphyne的容易合成，并促进其在电常放和超级电容器中的潜在应用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号