Journal
CARBON
Volume 106, Issue -, Pages 208-217Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2016.05.031
Keywords
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Funding
- National Natural Science Foundation of China [21476046, 21306022]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20132322120002]
- China Postdoctoral Science Foundation [2013M540269]
- Postdoctoral Science Foundation of Heilongjiang Province of China [LBH-TZ0417]
- US National Science Foundation grant [1505830]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1505830] Funding Source: National Science Foundation
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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.
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