Effect of additives in aqueous electrolytes on CO2 electroreduction
Effect of additives in aqueous electrolytes on CO2 electroreduction
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DOI：
10.1016/j.cej.2021.131303
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发表时间：
2021-09-02
影响因子：
15.1
通讯作者：
Biddinger, Elizabeth J.
中科院分区：
文献类型：
--
作者：
Golru, Samaneh Sharifi;Biddinger, Elizabeth J.
电化学还原二氧化碳（CO2ER）是一项很有前途的技术，可以降低大气中的二氧化碳水平，并生产高附加值的化学品和燃料。水溶液被认为是CO2ER最常见的电解质。然而，由于CO2溶解度低和寄生析氢反应的存在，导致CO2ER在水溶液中的选择性和活性不高。为了提高CO2ER在水溶液中的效率，已经提出了许多策略。其中，在水溶液中引入添加剂引起了相当大的关注。根据添加剂的化学和物理性质，它们已被证明可以提高CO2ER中的选择性和活性。本文综述了CO2ER水溶液添加剂的分类、机理、挑战和发展前景。
Electrochemical reduction of CO2 (CO2ER) is a promising technology to mitigate the CO2 level in the atmosphere, as well as, to produce value-added chemicals and fuels. Aqueous solutions are regarded as the most common electrolytes for CO2ER. However, there are some challenges such as low CO2 solubility and the presence of parasitic hydrogen evolution reaction which cause CO2ER in aqueous electrolytes to be inefficient in terms of selectivity and activity. A number of strategies have been proposed to enhance the efficiency for CO2ER in aqueous electrolytes. Among them, introducing additives to the aqueous solutions has attracted considerable attention. Depending on the chemical and physical properties of the additives, they have been demonstrated to improve the selectivity and activity in CO2ER. Herein, we provide a review on classification, mechanism, challenges, and perspectives of the additives in the aqueous electrolytes for CO2ER.