期刊
INORGANIC CHEMISTRY
卷 53, 期 19, 页码 10042-10044出版社
AMER CHEMICAL SOC
DOI: 10.1021/ic5020048
关键词
-
资金
- NSF [123072]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1230732] Funding Source: National Science Foundation
We report a mechanism of electrochemical ammonia (NH3) production via an iron intermediate in which H-2 and NH3 are cogenerated by different electron-transfer pathways. Solar thermal can contribute to the energy to drive this synthesis, resulting in a STEP, solar thermal electrochemical process, for NH3. Enhancements are presented to this carbon dioxide (CO2)-free synthesis, which uses suspensions of nano-Fe2O3 in high-temperature hydroxide electrolytes at nickel and Monel electrodes. In a 200 degrees C molten eutectic Na0.5K0.5OH electrolyte, the 3 Faraday efficiency per mole of synthesized NH3, eta(NH3,) increases with decreasing current density, and at j(electrolysis) = 200, 25, 2, and 0.7 mA cm(-2), eta(NH3) = 1%, 7%, 37%, and 71%, respectively. At 200 mA cm(-2), over 90% of applied current drives H-2, rather than NH3, formation. Lower temperature supports greater electrolyte hydration. At 105 degrees C in the hydrated Na0.5K0.5OH electrolyte, eta(NH3), increases and then is observed to be highly stable at eta(NH3) = 24(+/- 2)%.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据