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Selective Electrochemical Reduction of Nitrogen to Ammonia by Adjusting the Three-Phase Interface
- Source :
- Research, Vol 2019 (2019), Research
- Publication Year :
- 2019
- Publisher :
- American Association for the Advancement of Science, 2019.
-
Abstract
- The electrochemical nitrogen reduction reaction (NRR) provides a sustainable and alternative avenue to the Haber-Bosch process for ammonia (NH 3 ) synthesis. Despite the great efforts made on catalysts and electrolytes, unfortunately, current NRR suffers from low selectivity due to the overwhelming competition with the hydrogen evolution reaction (HER). Here, we present an adjusted three-phase interface to enhance nitrogen (N 2 ) coverage on a catalyst surface and achieve a record-high Faradic efficiency (FE) up to 97% in aqueous solution. The almost entirely suppressed HER process combined with the enhanced NRR activity, benefiting from the efficient three-interface contact line, is responsible for the excellent selectivity toward NH 3 , as evidenced by the theoretical and experimental results. Our strategy also demonstrates the applicability to other catalysts that feature strong H adsorption ability, to boost the FE for NH 3 synthesis above 90% and to improve the NRR activity by engineering the catalysts.
- Subjects :
- Multidisciplinary
Aqueous solution
Materials science
Science
02 engineering and technology
Electrolyte
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
Redox
0104 chemical sciences
Catalysis
Ammonia
chemistry.chemical_compound
Adsorption
Chemical engineering
chemistry
0210 nano-technology
Selectivity
Research Article
Subjects
Details
- Language :
- English
- ISSN :
- 26395274
- Volume :
- 2019
- Database :
- OpenAIRE
- Journal :
- Research
- Accession number :
- edsair.doi.dedup.....7742542526554325a24a27dcc1f8e8c9