Lithium-mediated ammonia synthesis from water and nitrogen: a membrane-free approach enabled by an immiscible aqueous/organic hybrid electrolyte system
| Autor: | Hyung Chul Yoon, Yifu Chen, Jong-In Han, Kwiyong Kim, Wenzhen Li |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Aqueous solution
010405 organic chemistry Chemistry Oxygen evolution Electrolyte 010402 general chemistry 01 natural sciences Pollution Dissociation (chemistry) 0104 chemical sciences Ammonia production chemistry.chemical_compound Chemical engineering Propylene carbonate Environmental Chemistry Hydroxide Faraday efficiency |
| Zdroj: | Green Chemistry. 21:3839-3845 |
| ISSN: | 1463-9270 1463-9262 |
| Popis: | The lithium-mediated pathway provides a promising way for facile and selective dissociation of nitrogen for ammonia synthesis. However, the prevailing electro-deposition of lithium, especially when coupled to the anodic oxygen evolution from water or hydroxide, presents disadvantages including the use of expensive Li-ion conducting ceramics (LISICON) or high temperature operation of molten salts. In this study, a membrane-free approach based on the immiscibility of aqueous/organic electrolytes was adopted for lithium electro-deposition, which could be utilized for subsequent nitridation and ammonia synthesis. We found that a biphasic system of aqueous 1 M LiClO4 and 1 M LiClO4/propylene carbonate reinforced with PMMA (poly(methyl methacrylate)) acts the same as a LISICON-based aqueous/organic hybrid electrolyte system, but without any physical membrane. With a fairly high faradaic efficiency (FE) of 57.2% and a production rate of 1.21 × 10−9 mol cm−2 s−1 for ammonia synthesis, this membrane-free approach and its application to ammonia synthesis provide an innovative way to the advancements in next-generation energy storage technologies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|