AI Article Synopsis
- Electrochemical conversion of nitrite to green ammonia addresses nitrogen cycle issues, but slow reaction rates and the need for effective catalysts are major challenges.
- The study highlights a new catalyst: molybdenum doped cobalt oxide nanoarray on titanium mesh (Mo-CoO/TM), which achieves a Faradaic efficiency of 96.9% and a NH yield of 651.5 μmol h cm at -0.5 V.
- Density functional theory shows that molybdenum enhances electron distribution and NO adsorption on cobalt, improving catalytic performance, and the Mo-CoO/TM system shows potential for practical applications in batteries.
Article Abstract
Electrochemical conversion of nitrite (NO) contaminant to green ammonia (NH) is a promising approach to achieve the nitrogen cycle. The slow kinetics of the complex multi-reaction process remains a serious issue, and there is still a need to design highly effective and selective catalysts. Herein, we report that molybdenum doped cobalt oxide nanoarray on titanium mesh (Mo-CoO/TM) acts as a catalyst to facilitate electroreduction of NO to NH. Such a catalyst delivers an extremely high Faradaic efficiency of 96.9 % and a corresponding NH yield of 651.5 μmol h cm at -0.5 V with strong stability. Density functional theory calculations reveal that the introduction of Mo can induce the redistribution of electrons around Co atoms and further strengthen the adsorption of NO, which is the key to facilitating the catalytic performance. Furthermore, the assembled battery based on Mo-CoO/TM suggests its practical application value.
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| http://dx.doi.org/10.1016/j.jcis.2024.02.153 | DOI Listing |
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