ボロン添加ダイヤモンド電極を用いた二酸化炭素の電気化学的還元における交換可能な製品選択性
Mai Tomisaki1, Seiji Kasahara1, Keisuke Natsui1
1Department of Chemistry , Keio University , 3-14-1 Hiyoshi , Yokohama 223-8522 , Japan.
Journal of the American Chemical Society
|April 16, 2019
まとめ
ボロン添加ダイヤモンド (BDD) 電極を用いた二酸化炭素 (CO2) の電気化学的減少は,交換可能な製品の選択性を可能にします. BDDのボロン濃度と電解質の最適化により,一酸化炭素や甲酸の効率的な生成が制御されます.
科学分野:
- 電気化学
- 材料科学
- カタリシス
背景:
- 二酸化炭素 (CO2) の電気化学的減少は,持続可能な化学生産のための有望な技術です.
- CO2の電気還元における製品の選択性は,電極材料と電解質の組成に大きく依存しています.
- 限られた研究で,単一の電極材料から製品の分布を制御することを探求した.
研究 の 目的:
- CO2の選択的電気化学的減少のためのボロン添加ダイヤモンド (BDD) 電極の使用を調査する.
- ボロン濃度,電解質,および製品の選択性を制御するための応用ポテンシャルなどのパラメータを最適化します.
- BDD電極を使って,一酸化炭素と甲酸の間で交換可能な製品の選択性を実証する.
主な方法:
- ボロンの濃度が変化するBDD電極を用いたCO2の電気化学的減少.
- エレクトロライト (KClO4,KCl) と応用ポテンシャルの最適化
- 反応中介物質を研究するために,全反射率赤外線 (ATR-IR) 顕微鏡を用いる.
主要な成果:
- 炭素一酸化物と甲酸の生産のための切替可能な選択性は,BDDボロン濃度と電解質の変動によって達成された.
- 1%のボロンBDD電極とKClO4電解質で,一酸化炭素に対する高い選択性が観察された.
- 0. 1% のボロンBDD電極とKCl電解質で高選択性が見られた.
- 局所ATR-IRは,BDD表面でのCO2ラジカルアニオン中間物質の吸収を確認した.
結論:
- BDD電極は,CO2の電気化学的減少のためにチューニング可能な選択性を提供します.
- 電解質の選択とBDDのボロンドーピングレベルは,製品形成を指示する重要な要因です.
- この研究は,BDD電極を用いて,制御されたCO2を有価な化学物質に変換する道を示しています.
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