期刊
ADVANCED FUNCTIONAL MATERIALS
卷 32, 期 17, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202109422
关键词
ammonia synthesis; interfacial system; in situ characterization; N; (2) reduction reaction; N; (2)-microextractor
类别
资金
- National Natural Science Foundation of China [52071226, 51872193, U21A20332, 5192500409]
- Natural Science Foundation of Jiangsu Province [BK20190827, BK20181168]
This study reports an N-2 microextractor (NME) that can extract N-2 from water and supply it to catalysts on electrodes. By enhancing the supply of N-2 in the NRR process, the NME achieves efficient electrocatalytic N-2 reduction, which is of great significance to the sustainable development of the Ammonia Economy.
The extremely low nitrogen (N-2) solubility in aqueous solution greatly limits the gas reactant supply to catalysts resulting in a bottleneck in establishing efficient electrocatalytic N-2 reduction reaction (NRR). Here, aiming at fairly few N-2 dissolving in aqueous electrolyte, an N-2-microextractor (NME) that can extract the N-2 from water, then feed it to catalysts on electrodes, is reported. The NME consists of polymer framework and extractant that possess high solubility for N-2, which serves as an ultra-thin interfacial system wrapping around electrodes. As expected, the enhancement of N-2 supply in NRR leads to a record-high Faradaic efficiency (80.1%) with an ammonia yield rate of 58.3 mu g h(-1) mg(-1) under ambient conditions. This is of great significance to a sustainable Ammonia Economy.
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