电催化剂
电化学
催化作用
纳米花
化学工程
氨生产
材料科学
氨
法拉第效率
涂层
可逆氢电极
化学
无机化学
纳米技术
电极
有机化学
物理化学
参比电极
工程类
作者
Jihai Duan,Dezan Shao,Xin He,Yuanchun Lu,Weiwen Wang
标识
DOI:10.1016/j.colsurfa.2021.126529
摘要
It is urgently needed to develop affordable non-precious metal catalysts which can inhibit the hydrogen evolution reaction (HER), achieving a large NH3 yield with a high Faraday Efficiency (FE) for electrochemical nitrogen reduction reaction (NRR). The MoS2@ZIF-71 electrocatalyst comprises a complete encapsulation of zeolitic-imidazole framework-71 over an array of ball-like MoS2 nanoflower. The interface engineering method was used to achieve the desired interface and structure with the enhanced NRR catalytic activity. In this model [email protected] interface, ZIF-71 coating concentrates N2 molecules at the MoS2-ZIF interface through their sorption within the inherent micropores and serves as a hydrophobic barrier to suppress HER, ball-like MoS2 nanoflower with the unique ultrathin subunits provides the rich active edges and sites for NRR. MoS2@ZIF-71 electrocatalyst exhibits a large NH3 yield rate of 56.69 μg h−1 mg−1MoS2 and a high FE of 30.91% at −0.2 V versus RHE under ambient conditions. This research will promote the further development of electrochemical ammonia under ambient conditions.
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