CO2を 1 A cm-2以上の活動でマルチ炭素製品に電解する
F Pelayo García de Arquer1, Cao-Thang Dinh1, Adnan Ozden2
1Department of Electrical and Computer Engineering, University of Toronto, 35 St. George St., Toronto, Ontario M5S 1A4, Canada.
Science (New York, N.Y.)
|February 8, 2020
まとめ
この研究は,炭素二酸化物 (CO2) の電解を促進する新しい触媒:イオンマスの大量ヘテロ結合 (CIBH) のアーキテクチャを導入しています. この設計は,触媒表面へのガスとイオン輸送を改善することによって,CO2の電解の生産性を大幅に高めます.
科学分野:
- 電気化学
- 材料科学
- 化学工学
背景:
- 電気分解は二酸化炭素 (CO2) を価値ある製品に変換する有望な方法です.
- 二酸化炭素の電解の生産性は,しばしば,触媒表面へのガスの不効率な拡散によって妨げられます.
- 既存の方法は,ガス,イオン,電子の輸送を同時に最適化するための課題に直面しています.
研究 の 目的:
- 大量輸送の制限を克服するCO2電解の新しいアーキテクチャを開発する.
- CO2をエチレンに変換する効率と生産性を向上させる.
- 先進的な電気化学炉のスケーラブルな設計を 示すために
主な方法:
- カタリスト:イオノマー・バルク・ヘテロジャンクション (CIBH) 構造の開発.
- 超細いイオノマー層を組み込み,水害性および水性性機能に合わせた.
- 高濃度のアルカリ性電解体 (7 M KOH) の銅触媒でのCO2減少の電気化学的特徴付け
主要な成果:
- CIBHアーキテクチャは,ガス,イオン,電子輸送経路を効果的に分離します.
- ガスとイオン輸送はナノメートルからマイクロメートルスケールに拡張されました.
- 1.3A/cm2の高いエチレン部分電流密度を達成した.
- エチレンへの二酸化炭素の電還元で45パーセントの電極エネルギー効率を達成した.
結論:
- CIBHアーキテクチャは,CO2電解技術の重要な進歩を表しています.
- この設計戦略は,CO2の高性能電気化学的変換を可能にします.
- この発見は,より効率的で生産的な温室効果ガスの再利用プロセスへの道を開きます.
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