Journal
CHEMELECTROCHEM
Volume 7, Issue 24, Pages 4900-4905Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.202001332
Keywords
ammonia; electrocatalysis; nitrogen reduction reaction; metal-organic frameworks; Co; C-900 composite
Categories
Funding
- National Natural Science Foundation of China [21902021, 21908017, 51972293, 51772039]
- Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science [20180510020]
- Fundamental Research Funds for the Central Universities [DUT18LK15, DUT18LK21, DUT20RC(4)020, DUT20RC(4)018]
- Supercomputing Center of Dalian University of Technology
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Electrocatalytic nitrogen reduction reaction (NRR), as a potential alternative to industrial ammonia synthesis (Haber-Bosch method), can achieve green and sustainable ammonia production under environmental conditions. However, the NRR process is still limited by the slow cleavage of the N equivalent to N triple bond and the existence of a competitive hydrogen evolution reaction. For this reason, many researchers have studied the construction and synthesis of high-efficiency nitrogen reduction electrocatalysts. Herein, a Co-based metal-organic framework (ZIF-67) was used to prepare Co/C-900 composites through high-temperature pyrolysis (900 degrees C) for ammonia synthesis under environmental conditions. The Co/C-900 catalysts exhibited excellent NRR performance, with a high NH3 yield of 4.66 mu mol cm(-2) h(-1) at -0.3 V (vs. RHE) and a faradaic efficiency of 11.53 % in 0.1 M potassium hydroxide. This work provides a simple strategy for the design of porous, non-noble-metal electrocatalysts for electrochemical NRR.
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