催化作用
电催化剂
材料科学
兴奋剂
电化学
活动站点
Atom(片上系统)
反应性(心理学)
碳纤维
纳米技术
化学工程
化学
微观结构
无机化学
物理化学
电极
光电子学
有机化学
复合材料
复合数
嵌入式系统
病理
工程类
计算机科学
替代医学
医学
作者
Xin Luo,Xiaoqian Wei,Hengjia Wang,Wenling Gu,Takuma Kaneko,Yusuke Yoshida,Xiao Zhao,Chengzhou Zhu
出处
期刊:Nano-micro Letters
[Springer Science+Business Media]
日期:2020-08-12
卷期号:12 (1)
被引量:153
标识
DOI:10.1007/s40820-020-00502-5
摘要
Abstract Single-atom catalysts (SACs) with nitrogen-coordinated nonprecious metal sites have exhibited inimitable advantages in electrocatalysis. However, a large room for improving their activity and durability remains. Herein, we construct atomically dispersed Fe sites in N-doped carbon supports by secondary-atom-doped strategy. Upon the secondary doping, the density and coordination environment of active sites can be efficiently tuned, enabling the simultaneous improvement in the number and reactivity of the active site. Besides, structure optimizations in terms of the enlarged surface area and improved hydrophilicity can be achieved simultaneously. Due to the beneficial microstructure and abundant highly active FeN 5 moieties resulting from the secondary doping, the resultant catalyst exhibits an admirable half-wave potential of 0.81 V versus 0.83 V for Pt/C and much better stability than Pt/C in acidic media. This work would offer a general strategy for the design and preparation of highly active SACs for electrochemical energy devices.
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