High-purity and high-concentration liquid fuels through CO2 electroreduction
High-purity and high-concentration liquid fuels through CO2 electroreduction
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DOI：
10.1038/s41929-021-00694-y
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发表时间：
2021-11
期刊：
影响因子：
37.8
通讯作者：
Peng Zhu;Haotian Wang
中科院分区：
文献类型：
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作者：
Peng Zhu;Haotian Wang
由电化学CO2还原反应（CO2RR）产生的液体燃料由于其高能量密度和易于储存和分配而特别令人感兴趣。不幸的是，由于传统CO2电解槽以及CO2RR催化剂的电流限制，它们通常以低浓度形成并与杂质混合。在这一观点中，我们强调，虽然可再生能源电价的下降可以大大降低液体燃料的形成成本，但下游的净化过程将增加额外的成本，大大损害其大规模应用的经济可行性。提出了反应器工程和催化剂改进的不同策略，以实现从CO2RR电解槽中直接和连续地产生高纯度和高浓度的液体燃料，使这种电化学路线在未来与传统化学工程工业相比更具竞争力。
Liquid fuels generated from the electrochemical CO2reduction reaction (CO2RR) are of particular interest due to their high energy densities and ease of storage and distribution. Unfortunately, they are typically formed in low concentrations and mixed with impurities due to the current limitations of traditional CO2electrolysers as well as CO2RR catalysts. In this Perspective, we emphasize that while the declining renewable electricity price can greatly lower the formation cost of liquid fuels, the downstream purification process will add an extra layer of cost that greatly harms their economic feasibility for large-scale applications. Different strategies in reactor engineering and catalyst improvement are proposed to realize the direct and continuous generation of high-purity and high-concentration liquid fuels from CO2RR electrolysers, allowing this electrochemical route to become more competitive compared with the traditional chemical engineering industry in the future.