期刊
NATURE ENERGY
卷 6, 期 7, 页码 733-741出版社
NATURE PORTFOLIO
DOI: 10.1038/s41560-021-00862-1
关键词
-
资金
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [NRF-2017R1A2B3012003, NRF-2018M3C1B7021994]
- KIST Institutional Program [NRF-2020M3H4A1A02084594]
- NRF - Ministry of Science and ICT [NRF-2017M3D1A1039377]
- Korea Environment Industry & Technology Institute (KEITI) through the Ecological Imitation-based Environmental Pollution Management Technology Development Project - Korea Ministry of Environment (MOE) [2021002800009]
- Institute of Engineering Research
- Research Institute of Advanced Materials (RIAM)
- Soft Foundry at Seoul National University
Electrochemical reduction of CO2 to produce fuel precursors and additives has traditionally been limited in product variety and overall efficiency. A recent study successfully utilized redox-neutral reactions to convert CO2 into dimethyl carbonate in methanol with high Faradaic efficiency, and expanded to diethyl carbonate. This approach shows promise in broadening the scope of products and improving efficiency through innovative design strategies.
Electrochemical reduction of CO2 can generate fuel precursors and additives, yet the set of possible products and overall efficiency are limited. Now, Lee et al. exploit redox-neutral reactions to form dimethyl carbonate from CO2 in methanol with 60% Faradaic efficiency and extend the scheme to diethyl carbonate. The electrochemical reduction of CO2 to value-added products is a promising approach for using CO2. However, the products are limited to reduced forms, such as CO, HCOOH and C2H4. Decreasing the anodic overpotential and designing membrane-separated systems are important determinants of the overall efficiency of the process. In this study we explored the use of redox-neutral reactions in electrochemical CO2 reduction to expand the product scope and achieve higher efficiency. We combined the CO2 reduction reaction with two redox cycles in an undivided cell so that the input electrons are carried through the electrolyte rather than settling in CO2. As a result, dimethyl carbonate-a useful fuel additive-has been synthesized directly from CO2 in methanol solvent with a Faradaic efficiency of 60% at room temperature. Our study shows that the formation of methoxide intermediates and the cyclic regeneration of the uniformly dispersed palladium catalyst by in situ-generated oxidants are important for dimethyl carbonate synthesis at room temperature. Furthermore, we successfully synthesized diethyl carbonate from CO2 and ethanol, demonstrating the generality and expandability of our system.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据