Amine-Functionalized Diamond Electrode for Boosting CO2Reduction to CO

Tatsuhiko Mikami, Takashi Yamamoto, Mai Tomisaki, Yasuaki Einaga

研究成果: Article査読

抄録

Carbon capture, utilization, and storage (CCUS) have been attracting much attention as an initiative to achieve carbon neutrality. In the capture and storage strategy, amines are widely used for highly efficient separation and capturing of CO2since amines react with CO2to form carbamates. In the utilization strategy, CO2electroreduction is a promising method to convert CO2into value-added compounds because reaction conditions are relatively mild and easily controlled. In this work, toward combining CO2capture and storage technologies and CO2electroreduction, we focused on amine modification of the electrode surface, in which boron-doped diamond (BDD) was chosen as a sustainable electrode material. CO2electroreduction using the amine-modified BDD was performed, and an applied potential dependence of the product selectivity was examined. In situ attenuated total reflectance-infrared measurements showed that the peak intensity of the stretching vibration of the carbonyl group at around 1640 cm-1decreased as applied potentials became more negative. The effect of amine modification of the BDD surface lies in the formation of a C-N bond during CO2electroreduction, resulting in the enhancement of the selectivity of CO production up to 8 times compared to the unmodified BDD.

本文言語English
ページ(範囲)14685-14692
ページ数8
ジャーナルACS Sustainable Chemistry and Engineering
10
45
DOI
出版ステータスPublished - 2022 11月 14
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 環境化学
  • 化学工学(全般)
  • 再生可能エネルギー、持続可能性、環境

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