Sustainable Carbons and Fuels: Recent Advances of CO2 Conversion in Molten Salts,ChemSusChem

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Sustainable Carbons and Fuels: Recent Advances of CO2 Conversion in Molten Salts
ChemSusChem ( IF 7.5 ) Pub Date : 2020-10-08 , DOI: 10.1002/cssc.202002060
Ao Yu ₁ , Guoming Ma ₂ , Jiawen Ren ₃ , Ping Peng ₄ , Fang-Fang Li ₅

Affiliation

The massive release of the greenhouse gas CO₂ has resulted in numerous environmental issues. In searching for advanced technologies for CO₂ capture/conversions, recent advances in electrochemical reduction of CO₂ in molten salts shed a light on potential solutions to CO₂ mitigation. Electro‐reduction of CO₂ in molten salts exhibits features like high selectivity and efficiency towards sustainable carbons and fuels, low toxicity, and possibility to combine with in situ CO₂ capture. In this Minireview, we highlight the tuning of the products in this process and mainly discuss two categories of electrolyte, carbonate‐based molten salts (CMS) and those based on halides (HMS). Depending on the synthetic conditions, fuels such as CO or hydrocarbons (in the presence of hydrogen source, i. e., LiOH, NaOH, or KOH in the electrolyte) as well as high‐value nanostructured carbons including carbon nanotubes, carbon nanofibers, carbon nano‐onions, and graphene can be obtained with high efficiency. The synthesis parameters are compared, and the applications of as‐obtained carbons are briefly summarized. Additionally, some perspectives on this technology are also discussed.

中文翻译：

可持续的碳和燃料：熔融盐中二氧化碳转化的最新进展

温室气体CO ₂的大量释放导致许多环境问题。在寻找用于CO ₂捕集/转化的先进技术时，熔融盐中的CO ₂电化学还原的最新进展为缓解CO _2的潜在解决方案提供了启示。电还原熔融盐中的CO ₂表现出诸如对可持续的碳和燃料的高选择性和高效率，低毒性以及可与原位CO _{2结合的特征}捕获。在此Minireview中，我们重点介绍了在此过程中对产品进行的调整，并主要讨论了两类电解质，即基于碳酸盐的熔融盐（CMS）和基于卤化物的电解质（HMS）。根据合成条件的不同，燃料例如CO或碳氢化合物（在电解液中存在氢源，即LiOH，NaOH或KOH的情况下）以及高价值的纳米结构碳，包括碳纳米管，碳纳米纤维，碳纳米纤维。洋葱和石墨烯可以高效获得。比较了合成参数，并简要总结了所获得的碳的应用。此外，还讨论了有关此技术的一些观点。

更新日期：2020-12-07

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