双金属片
化学
催化作用
电催化剂
电化学
法拉第效率
协同催化
可逆氢电极
吸附
化学工程
氮气
电子转移
氧化还原
无机化学
纳米技术
电极
光化学
材料科学
物理化学
有机化学
工作电极
工程类
作者
Shaobin Li,Kun Cheng,Lin Ma,Li Zhang,Fengbo Li,Qingyu Cheng
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2024-04-24
卷期号:63 (18): 8366-8375
被引量:5
标识
DOI:10.1021/acs.inorgchem.4c00760
摘要
The electrochemical nitrogen reduction reaction (eNRR) provides a sustainable green development route for the nitrogen-neutral cycle. In this work, bimetallic CoFe-MIL-88A with two active sites (Fe, Co) were immobilized on a 2D V2CTx MXene surface by in situ growth method to achieve the purpose of the control interface. A large number of heterostructures are formed between small CoFe-MIL-88A and V2CTx, which regulate the electron transfer between the catalyst interfaces. The adsorption and activation of nitrogen on the active sites were enhanced, and the NRR reaction kinetics was accelerated. CoFe-MIL-88A is tightly arranged on V2CTx, which makes CoFe-MIL-88A/V2CTx have better hydrophobicity and can significantly inhibit the hydrogen evolution reaction. The synergistic effect of multicatalytic active sites and multi-interface structure of CoFe-MIL-88A/V2CTx MXene is propitious to nitrogen efficiently and stably to convert into ammonia under environmental conditions with superior selectivity and good catalytic activity. The NH3 yield rate is 29.47 μg h–1 mgcat–1 at −0.3 V vs RHE, and the Faradaic efficiency (FE) is 28.86% at −0.1 V vs RHE. The catalytic mechanism was verified to conform to the distal pathway. This work will provide a new way to develop an MXene-based electrocatalyst for eNRR.
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