• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced energy materials >Ni-Activated Transition Metal Carbides for Efficient Hydrogen Evolution in Acidic and Alkaline Solutions
【24h】

Ni-Activated Transition Metal Carbides for Efficient Hydrogen Evolution in Acidic and Alkaline Solutions

机译：Ni活化的过渡金属碳化物，用于酸性和碱性溶液中有效的氢气进化

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

Transition metal carbides (TMCs) feature high catalytic activity and superior stability for the hydrogen evolution reaction (HER). However, their platinum-like HER catalytic performance is heavily hindered, due to their strong interaction with hydrogen. Herein, Ni activation of TMCs (M = V, Fe, Cr, and Mo) is proposed through introducing adsorbed nickel atoms on the TMC surface (Ni/TMC). In both acidic and alkaline solutions, a sharp decrease of both overpotentials and Tafel slopes of the Ni/TMC catalysts for HER is achieved. At 10 mA cm(-2), the overpotentials of the Ni/vanadium carbide (VC) and Ni/Fe3C catalysts are 128 and 93 mV in 1mKOH, 111 and 112 mV in 0.5mH(2)SO(4), respectively. Even at 150 mA cm(-2), they exhibit the overpotentials of as low as 270 and 291 mV, respectively. In the alkaline solutions, the performance of these Ni/TMC catalysts is even superior to a Pt/C catalyst. As confirmed from density functional theory calculations and X-ray absorption fine structure analysis, such adsorbed Ni atoms effectively optimize the d-electron structure and improve HER performance. As a versatile strategy, this work provides a universal route to activate TMCs for highly efficient HER in different media.
机译：过渡金属碳化物（TMC）具有高催化活性和氢进化反应（她）的优异稳定性。然而，由于它们与氢相互作用，它们的铂类似催化性能严重阻碍。这里，通过在TMC表面（Ni / TMC）上引入吸附的镍原子来提出Ni活化TMC（M = V，Fe，Cr和Mo）。在酸性和碱性溶液中，实现了对其的Ni / TMC催化剂的过电和Tafel斜率的急剧下降。在10 mA cm（-2）中，Ni /碳化钒（Vc）和Ni / Fe 3C催化剂的过电位分别为0.5mH（2）所以（4）的1MKOH，111和112mV中为128和93mV。即使在150 mA cm（-2）处，它们也分别表现出低至270和291mV的过电。在碱性溶液中，这些Ni / TMC催化剂的性能甚至优于Pt / C催化剂。从密度函数理论计算和X射线吸收细结构分析中确认，这种吸附的Ni原子有效地优化了D型电子结构并提高了她的性能。作为一个多功能策略，这项工作提供了一个通用的路线，以激活TMC在不同媒体中的高效。

著录项

  • 来源
    《Advanced energy materials》 |2020年第37期|2002260.1-2002260.10|共10页
  • 作者

    Yang Chenfan; Zhao Rong; Xiang Hui; Wu Jing; Zhong Wenda; Li Wenlong; Zhang Qin; Yang Nianjun; Li Xuanke;

  • 作者单位

    Hunan Univ Coll Mat Sci & Engn Hunan Prov Key Lab Adv Carbon Mat & Appl Technol Changsha 410082 Peoples R China;

    Wuhan Univ Sci & Technol Sch Chem & Chem Engn Hubei Prov Key Lab Coal Convers & New Carbon Mat Wuhan 430081 Peoples R China;

    Wuhan Univ Sci & Technol Sch Chem & Chem Engn Hubei Prov Key Lab Coal Convers & New Carbon Mat Wuhan 430081 Peoples R China;

    Hunan Univ Coll Mat Sci & Engn Hunan Prov Key Lab Adv Carbon Mat & Appl Technol Changsha 410082 Peoples R China;

    Hunan Univ Coll Mat Sci & Engn Hunan Prov Key Lab Adv Carbon Mat & Appl Technol Changsha 410082 Peoples R China;

    Hunan Univ Coll Mat Sci & Engn Hunan Prov Key Lab Adv Carbon Mat & Appl Technol Changsha 410082 Peoples R China;

    Wuhan Univ Sci & Technol Sch Chem & Chem Engn Hubei Prov Key Lab Coal Convers & New Carbon Mat Wuhan 430081 Peoples R China;

    Univ Siegen Inst Mat Engn D-57076 Siegen Germany;

    Hunan Univ Coll Mat Sci & Engn Hunan Prov Key Lab Adv Carbon Mat & Appl Technol Changsha 410082 Peoples R China|Wuhan Univ Sci & Technol Sch Chem & Chem Engn Hubei Prov Key Lab Coal Convers & New Carbon Mat Wuhan 430081 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    hydrogen evolution reaction; Ni activation; transition metal carbides;

    机译：氢进化反应;Ni活化;过渡金属碳化物;

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