纳米片
材料科学
电化学
密度泛函理论
催化作用
六方氮化硼
化学工程
氮化硼
硼
惰性
氮化物
纳米技术
氢
电极
化学
石墨烯
物理化学
有机化学
计算化学
工程类
图层(电子)
作者
Ya Zhang,Huitong Du,Yongjun Ma,Lei Ji,Haoran Guo,Ziqi Tian,Hongyu Chen,Hong Huang,Guanwei Cui,Abdullah M. Asiri,Fengli Qu,Liang Chen,Xuping Sun
出处
期刊:Nano Research
[Springer Nature]
日期:2019-03-07
卷期号:12 (4): 919-924
被引量:113
标识
DOI:10.1007/s12274-019-2323-x
摘要
Industrial production of NH3 from N2 and H2 significantly relies on Haber–Bosch process, which suffers from high energy consume and CO2 emission. As a sustainable and environmentally-benign alternative process, electrochemical artificial N2 fixation at ambient conditions, however, is highly required efficient electrocatalysts. In this study, we demonstrate that hexagonal boron nitride nanosheet (h-BNNS) is able to electrochemically catalyze N2 to NH3. In acidic solution, h-BNNS catalyst attains a high NH3 formation rate of 22.4 μg·h–1·mg–1cat. and a high Faradic efficiency of 4.7% at–0.75 V vs. reversible hydrogen electrode, with excellent stability and durability. Density functional theory calculations reveal that unsaturated boron at the edge site can activate inert N2 molecule and significantly reduce the energy barrier for NH3 formation.
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