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首页> 外文期刊>Advanced Materials >Atomic Fe Dispersed on N-Doped Carbon Hollow Nanospheres for High-Efficiency Electrocatalytic Oxygen Reduction
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Atomic Fe Dispersed on N-Doped Carbon Hollow Nanospheres for High-Efficiency Electrocatalytic Oxygen Reduction

机译：原子Fe分散在N掺杂碳空心纳米球上以实现高效电催化氧还原

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摘要

Exploration of high-efficiency, economical, and ultrastable electrocatalysts for the oxygen reduction reaction (ORR) to substitute precious Pt is of great significance in electrochemical energy conversion devices. Single-atom catalysts (SACs) have sparked tremendous interest for their maximum atom-utilization efficiency and fascinating properties. Therefore, the development of effective synthetic methodology toward SACs becomes highly imperative yet still remains greatly challenging. Herein, a reliable SiO2-templated strategy is elaborately designed to synthesize atomically dispersed Fe atoms anchored on N-doped carbon nanospheres (denoted as Fe-N-C HNSs) using the cheap and sustainable biomaterial of histidine (His) as the N and C precursor. By virtue of the numerous atomically dispersed Fe-N-4 moieties and unique spherical hollow architecture, the as-fabricated Fe-N-C HNSs exhibit excellent ORR performance in alkaline medium with outstanding activity, high long-term stability, and superior tolerance to methanol crossover, exceeding the commercial Pt/C catalyst and most previously reported non-precious-metal catalysts. This present synthetic strategy will provide new inspiration to the fabrication of various high-efficiency single-atom catalysts for diverse applications.
机译：探索用于氧还原反应（ORR）的高效，经济和超稳定的电催化剂，以替代贵重的Pt在电化学能量转换装置中具有重要意义。单原子催化剂（SAC）以其最大的原子利用效率和引人入胜的性能引起了极大的兴趣。因此，开发针对SAC的有效合成方法变得非常必要，但仍然具有很大的挑战性。本文中，精心设计了一种可靠的SiO2模板化策略，以廉价，可持续的组氨酸生物材料（His）作为N和C的前体，合成锚定在N掺杂碳纳米球（表示为Fe-N-C HNSs）上的原子分散的Fe原子。凭借众多原子分散的Fe-N-4部分和独特的球形空心结构，所制得的Fe-NC HNS在碱性介质中表现出出色的ORR性能，具有出色的活性，高长期稳定性以及对甲醇穿越的优异耐受性超过了商用Pt / C催化剂和以前报道的大多数非贵金属催化剂。本合成策略将为各种用途的各种高效单原子催化剂的制备提供新的启示。

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  • 来源
    《Advanced Materials》 |2019年第8期|1806312.1-1806312.8|共8页
  • 作者

    Chen Yifan; Li Zhijuan; Zhu Yanbo; Sun Dongmei; Liu Xien; Xu Lin; Tang Yawen;

  • 作者单位

    Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China;

    Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Qingdao 266042, Peoples R China;

    Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Fe-N-C; hollow carbon nanospheres; non-precious metals; oxygen reduction reaction; single-atom catalysts;

    机译：Fe-N-C;空心碳纳米球;非贵金属;氧还原反应;单原子催化剂;

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