The conversion of CO₂ into carbon materials and oxygen gas has great significance for reducing the greenhouse gas concentrations of Earth and realizing in situ utilization of Mars’ atmosphere. In this work, LiF-Li₂O melts containing CO₂ were electrolyzed using a Ni cathode and Pt anode at 850°C. Carbon materials with different morphologies were deposited on the cathode and oxygen evolution was detected in anode gas. The products were characterized by Raman spectroscopy, x-ray diffraction, scanning electron microscopy and gas chromatography. The results demonstrated that CO₂ was firstly captured and converted into the carbonate in LiF-Li₂O melts, and subsequently electrolyzed. The morphologies of the carbon material obtained on the cathode were dependent on the electrolysis potentials. The rate of CO₂ and O₂ production in the anode gas was related to the reaction process, current density, and potentials. Electrochemical decomposition of CO₂ into carbon materials and oxygen gas in a fluoride melt was proved to be feasible.

CO ₂转化为碳材料和氧气对于降低地球温室气体浓度和实现火星大气的原位利用具有重要意义。在这项工作中，使用Ni阴极和Pt阳极在850℃下电解含CO _2的LiF-Li ₂ O熔体。具有不同形态的碳材料沉积在阴极上，并在阳极气体中检测到氧气逸出。通过拉曼光谱，X射线衍射，扫描电子显微镜和气相色谱对产物进行表征。结果表明，LiF-Li ₂中CO ₂被首先捕获并转化为碳酸盐O熔化，随后被电解。在阴极上获得的碳材料的形态取决于电解电位。阳极气体中CO ₂和O _2的产生速率与反应过程，电流密度和电势有关。事实证明，在氟化物熔体中将CO ₂电化学分解为碳材料和氧气是可行的。