Unique properties of fine bubbles in the electrochemical reduction of carbon dioxide using boron-doped diamond electrodes
Unique properties of fine bubbles in the electrochemical reduction of carbon dioxide using boron-doped diamond electrodes
复制标题
使用掺硼金刚石电极电化学还原二氧化碳时细小气泡的独特性能
DOI：
10.1016/j.electacta.2021.138769
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发表时间：
2021
影响因子：
6.6
通讯作者：
Einaga Yasuaki
中科院分区：
文献类型：
--
作者：
Tomisaki Mai;Natsui Keisuke;Fujioka Satoko;Terasaka Koichi;Einaga Yasuaki
研究了带有细小气泡的水溶液中掺硼金刚石（BDD）电极上的电化学 CO2 还原。与没有细小气泡的CO2还原相比，有细小气泡的CO2还原过程中过电势降低，促进了一氧化碳的生成。研究表明，溶液中的细小气泡可以促进质量传递，也可以作为产生一氧化碳的催化剂。电位相关的原位衰减全反射红外 (ATR-IR) 测量证实了催化活性，表明在含有 CO2 细泡的溶液中，CO2·中间体或 CO2 分子本身在电极附近变得稳定，与使用不含 CO2 细泡的溶液相比，这些可以更容易地吸附在电极表面上。报道的工作是了解二氧化碳还原反应中细小气泡影响的第一步。
The electrochemical CO2reduction on boron-doped diamond (BDD) electrodes in an aqueous solution with fine bubbles was studied. The overpotential decreased and the production of carbon monoxide was promoted in the CO2reduction with fine bubbles compared to that without fine bubbles. It is suggested that fine bubbles in solution could facilitate the mass transport and also act as the catalyst for producing carbon monoxide. Potential-dependentin-situattenuated total reflectance-infrared (ATR-IR) measurements confirmed the catalytic activity, showing that in solutions with CO2fine bubbles the CO2•–intermediate or the CO2molecules themselves become stabilized near the electrode and these can be adsorbed on the electrode surface more easily compared to using solutions without CO2fine bubbles. The reported work is a first step in understanding the effects of fine bubbles in CO2reduction reactions.