CO2をフォーマットからCOに切り替える原子インジウム触媒
Weiwei Guo1,2, Xingxing Tan1,2, Jiahui Bi1,2
1Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Journal of the American Chemical Society
|April 15, 2021
まとめ
窒素ドーピングされた炭素 (InA/NC) の原子インジウム触媒は,二酸化炭素 (CO2) を効率的に一酸化炭素 (CO) に変換する. この高度な触媒は,高い選択性と回転頻度を達成し,CO2利用に有望な解決策を提供します.
科学分野:
- 電気化学
- 材料科学
- キャタリシス
背景:
- 二酸化炭素 (CO2) の電気化学的削減は,温室効果ガスの排出を軽減し,エネルギー需要に対応するために不可欠です.
- 有価な化学物質と燃料に CO2 を選択的に変換するための効率的な触媒の開発は重要な研究分野です.
研究 の 目的:
- CO2を一酸化炭素 (CO) に電還元するために窒素添加炭素 (InA/NC) に固定された原子インジウム触媒の使用を調査する.
- 従来のインジウムベースの材料とは異なる高精度と効率のCO2変換を実現する.
主な方法:
- インジウム基の金属有機フレームワーク (MOF) とディカンジアミドの溶解による窒素添加炭素 (InA/NC) 上の原子インジウム触媒の合成.
- 混合イオン液体/アセトニトリル電解質における電気化学的特徴づけ
- ファラダイク効率 (FE),電流密度,回転頻度 (TOF) を含む触媒性能の分析.
主要な成果:
- InA/NCは,選択的なCO生成の優れた性能を示し,COの97.2%のFEと39.4mAcm-2の総電流密度を達成しました.
- 触媒は約40,000 h-1の高回転頻度 (TOF) を示し,これはCO生産で報告されている最高値の1つです.
- InA/NC触媒は,二重層容量とCO2吸収能力などの優れた安定性と優れた電気化学的性質を示した.
結論:
- InA/NCのIn-N部位は,COの形成を促進し,高CO選択性につながるフォーマット生成を抑制するために重要である.
- 触媒の活性化は,二重層容量,二酸化炭素吸収,電荷移転抵抗の改善に起因する.
- この研究は,選択的な電気化学的CO2削減のための非常に効率的な原子インジウム触媒を提示し,CO2利用のための持続可能な経路を提供します.
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