双金属片
三聚氰胺
双功能
化学
催化作用
分子
过渡金属
化学工程
材料科学
碳纤维
质子交换膜燃料电池
纳米技术
金属
金属有机骨架
贵金属
热解
无机化学
冶金
有机化学
物理化学
复合材料
复合数
吸附
工程类
作者
Fenghong Lu,Kaicai Fan,Lixiu Cui,Ye Yang,Wenxuan Wang,Guitao Zhang,Chengbin Wang,Qi Zhang,Bin Li,Lingbo Zong,Lei Wang
标识
DOI:10.1016/j.cej.2021.133242
摘要
The development of noble-metal-free single atom electrocatalysts (SAECs) with both remarkable activity and durability for oxygen reduction reaction (ORR) are in great demand for large-scale commercialization of proton-exchange membrane fuel cells and metal-air batteries. Here, we developed a novel strategy to fabricate high-performance Cu-SAs/NSs from pyrolysis of two-dimensional (2D) Cu/Zn bimetallic MOF. Specifically, nitrogen-rich molecules (melamine) were deliberately added to intrigue the self-assembly of Cu/Zn bimetallic MOF, and contribute to the formation of highly porous structure and abundant Cu-N4 active sites. With the enhanced accessibility of active sites and mass transport, the as-developed Cu-SAs/NSs display a remarkable ORR performance in alkaline media, outperforming the benchmark Pt/C and most of platinum group metals (PGMs)-free electrocatalysts reported to date. Notably, this facile strategy can be extended to fabricate other transition metal (TM, TM = Fe, Co, Ni)-based single atoms. This work presents a novel and general strategy to construct carbon-based SAECs towards ORR.
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