石墨烯
堆积
催化作用
氧化物
材料科学
金属
纳米技术
电化学
离域电子
热解
化学工程
化学
电极
有机化学
工程类
物理化学
冶金
作者
Rui Hao,Jingjing Chen,Jing Hu,Shuai Gu,Qingmeng Gan,Yingzhi Li,Zhiqiang Wang,Wen Luo,Hongkuan Yuan,Guiyu Liu,Chunliu Yan,Junjun Zhang,Kaiyu Liu,Chen Liu,Zhouguang Lu
标识
DOI:10.1016/j.jcis.2023.05.122
摘要
Metal macrocycles with well-defined molecular structures are ideal platforms for the in-depth study of electrochemical oxygen reduction reaction (ORR). Structural integrity of metal macrocycles is vital but remain challenging since the commonly used high-temperature pyrolysis would cause severe structure damage and unidentifiable active sites. Herein, we propose a pyrolysis-free strategy to precisely manipulate the exfoliated 2D iron polyphthalocyanine (FePPc) anchored on reduced graphene oxide (rGO) via π–π stacking using facile high-energy ball milling. A delocalized electron shift caused by π–π interaction is firstly found to be the mechanism of facilitating the remarkable ORR activity of this hybrid catalyst. The optimal FePPc@rGO-HE achieves superior half-wave potential (0.90 V) than 20 % Pt/C. This study offers a new insight in designing stable and high-performance metal macrocycle catalysts with well-defined active sites.
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