催化作用
材料科学
电催化剂
吸附
电池(电)
纳米技术
碳纤维
球体
化学工程
Atom(片上系统)
氧还原反应
氧气
氧原子
电极
物理化学
化学
分子
复合材料
电化学
有机化学
嵌入式系统
工程类
物理
功率(物理)
复合数
量子力学
计算机科学
天文
作者
Lixiu Cui,Kaicai Fan,Lingbo Zong,Fenghong Lu,Ming Zhou,Bin Li,Lichen Zhang,Lingyu Feng,Xia Li,Yanan Chen,Lei Wang
标识
DOI:10.1016/j.ensm.2021.11.007
摘要
Single-atom electrocatalysts (SACs) have demonstrated fascinated electrocatalytic performance towards oxygen reduction reaction (ORR), while designing SACs with abundant accessible active sites is still challenging. Here, we report a facile sol-gel pore-sealing strategy for anchoring N coordinated Ru single atoms (SAs) onto the pore edges of the activated carbon spheres ([email protected]) to enhance their accessibility. The fabricated electrocatalyst possesses outstanding ORR performance under alkaline conditions, outperforming most of recently reported SACs. Theoretical calculations screen that carbon edge could significantly modify the second coordination spheres of the central Ru atoms and the electronic structures of Ru-N4 sites, contributing to preferable ORR intermediate adsorption energy and high intrinsic catalytic activity. The Zn–air battery assembled using [email protected] exhibits high power density and remarkable charge–discharge stability. The projected strategy provides valuable guidance on fabricating highly accessible SAs and engineering the second coordination spheres of metal atoms to achieve efficient SACs.
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