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- Title
Local Proton Source Enhanced Nitrogen Reduction on a Combined Cobalt‐Molybdenum Catalyst for Electrochemical Ammonia Synthesis.
- Authors
Chung, Sunki; Ju, HyungKuk; Choi, Minjun; Yoon, Donghyun; Lee, Jaeyoung
- Abstract
Electrochemical nitrogen reduction reaction (NRR) under ambient conditions has attracted considerable scientific and engineering interest as a green alternative route for NH3 production. Molybdenum is a promising candidate as an electrocatalyst for NRR as it has a suitable binding strength with N species. However, the design of an efficient Mo‐based catalyst remains elusive. To enhance the selectivity of NRR toward NH3, we have developed a carbon nanofiber catalyst embedded with molybdenum and cobalt (Co−Mo−CNF). Co with a strong ability to dissociate water enhances local proton source near Mo, where the hydrogenation step of the NRR occurs. A NH3 formation rate of 72.72 μg h−1 mg−1 and a Faradaic efficiency of 34.5 % were obtained at −0.5 V vs. RHE. We also attempted to provide a mechanistic understanding of the NRR via in situ attenuated total reflectance surface‐enhanced infrared absorption spectroscopy (ATR‐SEIRAS) and isotopic labeling experiments using 15N2 and D2O.
- Subjects
MOLYBDENUM; INFRARED absorption; ELECTROLYTIC reduction; MOLYBDENUM catalysts; PROTONS; CATALYSTS; AMMONIA
- Publication
Angewandte Chemie, 2022, Vol 134, Issue 47, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202212676