催化作用
硫黄
法拉第效率
剥脱关节
可逆氢电极
化学
电化学
氮气
质子化
等离子体
密度泛函理论
产量(工程)
分子
反应机理
氢
化学工程
电极
无机化学
材料科学
纳米技术
石墨烯
物理化学
有机化学
计算化学
工作电极
离子
物理
量子力学
工程类
冶金
作者
Junyu Zhang,Jingxuan Zheng,Zhao Wang
标识
DOI:10.1016/j.ces.2023.119076
摘要
Two-dimensional (2D) MoS2 was synthesized in situ with cold plasma at a moderate temperature. The mechanism of exfoliation process by plasma is gas expansion and electron repulsion. Notably, S defects in MoS2 was easily controlled by the treatment time of plasma. The 2D structure exposed a higher number of active sites, and sulfur defects facilitated the activation of nitrogen, thereby enhancing the performance of NRR catalysis. Electrochemical testing demonstrated that the sample achieved a high Faradaic efficiency of 29.04% at −0.2 V relative to a reversible hydrogen electrode (RHE), along with an NH3 yield rate of 10.29 μg h−1 mg−1 cat. at −0.3 V (vs. RHE) in 0.1 M Na2SO4 under ambient conditions. Density functional theory calculations indicated that the catalyzed NRR reaction followed the enzymatic reaction pathway and that the introduction of S defects effectively reduced the reaction energy barrier and promoted the protonation of N2 molecules.
科研通智能强力驱动
Strongly Powered by AbleSci AI