Electro-synthesis of Ammonia from Dilute Nitric Oxide on a Gas Diffusion Electrode
| Autor: | Jong-In Han, Youngkook Kwon, Won June Kim, Seonjeong Cheon, Dong Yeon Kim |
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| Rok vydání: | 2022 |
| Předmět: |
Electrolysis
Gas diffusion electrode Renewable Energy Sustainability and the Environment Inorganic chemistry chemistry.chemical_element Energy Engineering and Power Technology Electrolyte Electrochemistry Nitrogen law.invention Catalysis Ammonia chemistry.chemical_compound Fuel Technology chemistry law Chemistry (miscellaneous) Materials Chemistry Faraday efficiency |
| Zdroj: | ACS Energy Letters. 7:958-965 |
| ISSN: | 2380-8195 |
| DOI: | 10.1021/acsenergylett.1c02552 |
| Popis: | The electrochemical conversion of nitric oxide (NO) to ammonia (NH3) provides a sustainable route to transform an air pollutant into a value-added chemical. However, the development of NO electroreduction remains hindered by the poor solubility in aqueous electrolytes, requiring the use of concentrated NO. Here, we report a dilute NO reduction using a gas diffusion electrode (GDE) to circumvent the mass transport issue. Through the incorporation of nanoscale zero-valent iron into carbon on the GDE, 96% NH3 Faradaic efficiency was achieved with 1% NO, and the computational calculations revealed that the Fe catalyzed the breaking of the N–O bond in the H2NO intermediate. The NH3 production rate was accelerated by controlling the concentration of protons in the electrolyte and reached 1,239 µmol cm-2h-1 with 10% NO. Our findings show that the gas-phase electrolysis of dilute NO can offer a practical option for upcycling the waste nitrogen. |
| Databáze: | OpenAIRE |
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