MXenes公司
材料科学
催化作用
电催化剂
电子顺磁共振
化学工程
电化学
产量(工程)
复合数
氧化还原
异质结
分解水
可逆氢电极
氮化物
纳米技术
无机化学
电极
光催化
物理化学
复合材料
化学
光电子学
图层(电子)
生物化学
物理
核磁共振
参比电极
工程类
冶金
作者
Leiming Tao,Liming Huang,Wen Qin,Kui Pang,Mengdi Zhang,Linhai Duan,Yingjun He,Guanhua Zhu,Chenglin Wen,Changlin Yu,Hongbing Ji
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2023-11-02
卷期号:6 (22): 21068-21078
被引量:2
标识
DOI:10.1021/acsanm.3c04023
摘要
The electrochemical transformation of nitrogen (N2) into valuable ammonia (NH3) is a highly coveted process that poses a formidable challenge owing to the inherent inertness of the N2 molecule. The creation step in the development of this process is the development of a long-lasting electrocatalyst. Herein, we presented a simple one-step hydrothermal method for assembling MoSe2 nanosheets on multilayer Ti3C2 MXenes (MoSe2/Ti3C2 composite) to serve as a reliable and effective catalyst for the nitrogen reduction reaction (NRR). The present study employs two detection methods, namely, ultraviolet–visible (UV–vis) and ion chromatography, to determine the ammonia yield of MoSe2/Ti3C2 composite catalysts. MoSe2/Ti3C2 composites show outstanding NRR activity with a superior NH3 yield rate of 60.87 μg·h–1·mgcat.–1 at −0.55 V vs reversible hydrogen electrode (RHE) and Faraday efficiency of 9.3% at −0.25 V vs RHE, markedly better than individual MoSe2 or Ti3C2 MXene components. In addition, this composite also has excellent stability and durability during the recycling test. In addition, we have demonstrated the existence of Se vacancies in the catalyst through electron paramagnetic resonance (EPR). The density functional theory calculation (DFT) reveals that abundant Se vacancies play a significant role in enhancing the NRR activity by increasing the conductivity and reducing reaction barriers for intermediate formation. This work opens up an avenue for designing MXene-based electrocatalysts by constructing heterostructures for NRR.
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