法拉第效率
电化学
氨
产量(工程)
水溶液
氮气
选择性
氧化还原
材料科学
电解质
氨生产
无机化学
化学
电极
有机化学
物理化学
催化作用
冶金
作者
Bryan H. R. Suryanto,Da-Bin Wang,Luis Miguel Azofra,Moussab Harb,Luigi Cavallo,Rouhollah Jalili,David R. G. Mitchell,Manjunath Chatti,Douglas R. MacFarlane
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2018-12-28
卷期号:4 (2): 430-435
被引量:261
标识
DOI:10.1021/acsenergylett.8b02257
摘要
The electrochemical N2 reduction reaction (NRR) offers a direct pathway to produce NH3 from renewable energy. However, aqueous NRR suffers from both low Faradaic efficiency (FE) and low yield rate. The main reason is the more favored H+ reduction to H2 in aqueous electrolytes. Here we demonstrate a highly selective Ru/MoS2 NRR catalyst on which the MoS2 polymorphs can be controlled to suppress H+ reduction. A NRR FE as high as 17.6% and NH3 yield rate of 1.14 × 10–10 mol cm–2 s–1 are demonstrated at 50 °C. Theoretical evidence supports a hypothesis that the high NRR activity originates from the synergistic interplay between the Ru clusters as N2 binding sites and nearby isolated S-vacancies on the 2H-MoS2 as centers for hydrogenation; this supports formation of NH3 at the Ru/2H-MoS2 interface.
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