...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of power sources >Nitrogen-doped hierarchically porous carbon spheres as efficient metal-free electrocatalysts for an oxygen reduction reaction
【24h】

Nitrogen-doped hierarchically porous carbon spheres as efficient metal-free electrocatalysts for an oxygen reduction reaction

机译：氮掺杂的分级多孔碳球可作为氧还原反应的高效无金属电催化剂

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

Using hierarchically mesoporous silica spheres as a hard template and methyl violet as carbon and nitrogen source, nitrogen-doped hierarchically porous carbon spheres (N-HCS) are successfully prepared via a nanocasting method. The nitrogen-doped carbon spheres obtained after carbonization at 1000 C (N-HCS-1000) exhibit a hierarchically micro-meso-macroporous structure with a relatively high surface area (BET) of 1413 m(2) g(-1) and a notably large pore volume of 2.96 cm(3) g(-1). In an oxygen reduction reaction (ORR) in alkaline media, the N-HCS-1000 material exhibits excellent activity with high current density, and its onset potential is notably close to that of the commercial Pt/C catalyst. The efficient catalytic activity of this catalyst could be attributed to the high electrical conductivity of the nitrogen-doped carbon matrix as well as the hierarchically porous framework. This catalyst also exhibits better methanol crossover resistance and higher stability than the commercial Pt/C catalyst. (C) 2015 Elsevier B.V. All rights reserved.
机译：使用分级介孔二氧化硅球作为硬模板，使用甲基紫作为碳和氮源，通过纳米浇铸方法成功制备了氮掺杂的分级多孔碳球（N-HCS）。在1000 C（N-HCS-1000）碳化后获得的氮掺杂碳球表现出具有相对较高的表面积（BET）为1413 m（2）g（-1）和显着的2.96 cm（3）g（-1）的大孔体积。在碱性介质中的氧还原反应（ORR）中，N-HCS-1000材料在高电流密度下显示出出色的活性，并且其起始电势明显接近于商用Pt / C催化剂。该催化剂的有效催化活性可以归因于氮掺杂碳基体以及分层多孔骨架的高电导率。与市售的Pt / C催化剂相比，该催化剂还表现出更好的耐甲醇穿越性和更高的稳定性。 （C）2015 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Journal of power sources》 |2015年第1期|389-396|共8页
  • 作者

    Liu You-Lin; Shi Cheng-Xiang; Xu Xue-Yan; Sun Ping-Chuan; Chen Tie-Hong;

  • 作者单位

    Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Key Lab Adv Energy Mat Chem MOE, Coll Chem,Inst New Catalyt Mat Sci, Tianjin 300071, Peoples R China;

    Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Key Lab Adv Energy Mat Chem MOE, Coll Chem,Inst New Catalyt Mat Sci, Tianjin 300071, Peoples R China;

    Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Key Lab Adv Energy Mat Chem MOE, Coll Chem,Inst New Catalyt Mat Sci, Tianjin 300071, Peoples R China;

    Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Key Lab Adv Energy Mat Chem MOE, Coll Chem,Inst New Catalyt Mat Sci, Tianjin 300071, Peoples R China;

    Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Key Lab Adv Energy Mat Chem MOE, Coll Chem,Inst New Catalyt Mat Sci, Tianjin 300071, Peoples R China;

  • 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

    Nitrogen-doped; Hierarchically porous carbon spheres; Metal-free; Oxygen reduction;

    机译：氮掺杂;分层多孔碳球;无金属;氧还原;

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