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An Amorphous Noble‐Metal‐Free Electrocatalyst that Enables Nitrogen Fixation under Ambient Conditions
Angewandte Chemie International Edition ( IF 16.6 ) Pub Date : 2018-03-23 , DOI: 10.1002/anie.201801538
Chade Lv 1, 2 , Chunshuang Yan 1, 2 , Gang Chen 1 , Yu Ding 2 , Jingxue Sun 1 , Yansong Zhou 1 , Guihua Yu 2
Affiliation  

N2 fixation by the electrocatalytic nitrogen reduction reaction (NRR) under ambient conditions is regarded as a potential approach to achieve NH3 production, which still heavily relies on the Haber–Bosch process at the cost of huge energy and massive production of CO2. A noble‐metal‐free Bi4V2O11/CeO2 hybrid with an amorphous phase (BVC‐A) is used as the cathode for electrocatalytic NRR. The amorphous Bi4V2O11 contains significant defects, which play a role as active sites. The CeO2 not only serves as a trigger to induce the amorphous structure, but also establishes band alignment with Bi4V2O11 for rapid interfacial charge transfer. Remarkably, BVC‐A shows outstanding electrocatalytic NRR performance with high average yield (NH3: 23.21 μg h−1 mg−1cat., Faradaic efficiency: 10.16 %) under ambient conditions, which is superior to the Bi4V2O11/CeO2 hybrid with crystalline phase (BVC‐C) counterpart.

中文翻译:

一种能够在环境条件下固氮的非晶态无贵金属电催化剂

在环境条件下通过电催化氮还原反应(NRR)固定N 2被认为是实现NH 3生产的潜在方法,该方法仍大量依赖Haber-Bosch工艺,但要消耗大量能量和大量生产CO 2。具有无定形相(BVC-A)的无贵金属Bi 4 V 2 O 11 / CeO 2杂化物用作电催化NRR的阴极。非晶态Bi 4 V 2 O 11包含明显的缺陷,这些缺陷起着活性位点的作用。首席执行官2不仅用作引发非晶结构的触发器,而且还与Bi 4 V 2 O 11建立能带对准,以实现快速的界面电荷转移。值得注意的是,BVC-A在环境条件下具有出色的电催化NRR性能,平均收率高(NH 3:23.21μgh -1  mg -1 cat。,法拉第效率:10.16%),优于Bi 4 V 2 O 11 / CeO 2杂化物与结晶相(BVC-C)对应物。
更新日期:2018-03-23
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