One-pot synthesis of nanostructured carbon materials from carbon dioxide via electrolysis in molten carbonate salts
One-pot synthesis of nanostructured carbon materials from carbon dioxide via electrolysis in molten carbonate salts
复制标题
熔融碳酸盐电解二氧化碳一锅法合成纳米结构碳材料
DOI：
10.1016/j.carbon.2016.05.031
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发表时间：
2016-09-01
期刊：
影响因子：
10.9
通讯作者：
Licht, Stuart
中科院分区：
文献类型：
--
作者：
Wu, Hongjun;Li, Zhida;Licht, Stuart
二氧化碳作为温室效应的罪魁祸首，受到了全球的关注，目前开发的减少二氧化碳排放的技术差异很大。在本研究中，CO2在不同的Li-Na-K碳酸盐熔融混合物中被电化学还原为碳纳米材料。通过调节电解电流密度、电解液和电解温度，碳产物具有不同的蜂窝状和纳米管状结构。随着温度的升高，观察到从蜂窝/血小板到纳米碳形态的转变发生在600℃左右。纳米结构的观察结果与更高的结构多样性相一致，这些结构可能在更高的温度下发生重排动力学。从Li-Na-K电解质中观察到碳纳米管（CNT）的高产率，从Na-K碳酸电解质中观察到碳纳米管（CNT）的高产率，但从纯锂，或混合锂- na或混合锂- ba碳酸电解质中观察到碳纳米管产品直径随着电解时间的增加而增加。(C) 2016年作者。Elsevier Ltd.出版。
As the primary culprit of greenhouse effect, carbon dioxide has garnered global attention, and the technologies currently being developed to reduce the emission of CO2 vary widely. In this study, CO2 was electrochemically reduced in various molten mixtures of Li-Na-K carbonates to carbon nanomaterials. By regulating the electrolysis current density, electrolyte, and electrolytic temperature, the carbon products had different morphologies of honeycomb-like and nanotubular structures. A transition from a honeycomb/platelet to nanomaterial carbon morphology was observed to occur at similar to 600 degrees C with increase in temperature. The observation of nanostructures is consistent with a higher diversity of structures possible with enhanced rearrangement kinetics that can occur at higher temperature. A high yield of a carbon nanotube (CNT) was not observed from a Li-Na-K electrolyte, no CNTs are formed from a Na-K carbonate electrolyte, but a high yield is observed from pure Li, or mixed Li-Na or mixed Li-Ba carbonate electrolytes, and the carbon nanotube product diameter is observed to increase with increasing electrolysis time. (C) 2016 The Authors. Published by Elsevier Ltd.