材料科学
法拉第效率
堆积
氨生产
可逆氢电极
碳纳米管
化学工程
氮气
氨
过电位
固碳
共价键
无机化学
碳纤维
共价有机骨架
电极
电化学
多孔性
纳米技术
有机化学
物理化学
二氧化碳
复合材料
化学
复合数
工作电极
工程类
作者
Qiming Yu,Hongming Wang
标识
DOI:10.1142/s1793604721510279
摘要
Electrocatalytic nitrogen reduction under ambient conditions is a promising approach for ammonia synthesis, but it is challenging to develop highly efficient electrocatalysts. In this work, a hybrid of covalent organic framework (COF) and carbon nanotubes (CNTs) are developed for efficient nitrogen electroreduction with a high faradaic efficiency (FE) of 12.7% at 0.0 V versus reversible hydrogen electrode (RHE) and a remarkable production rate of ammonia up to 8.56 [Formula: see text]g h[Formula: see text] mg[Formula: see text] at –0.2 V versus RHE. Experiments and theoretical calculations reveal that Ni centers are active sites for NH 3 synthesis, while the [Formula: see text]–[Formula: see text] stacking between COF-366-Ni and conductive CNTs scaffold results in the rapid interfacial charge transfer. This investigation provides new insights on the rational design of organic–inorganic porous hybrids for efficient nitrogen conversion and ammonia synthesis at ambient conditions.
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