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効率的な水素生成のためのダブルサイト触媒のIrN₄-RhN₄に対する電気化学加速度水ガスシフト反応

Qie Liu¹, Liyuan Gong¹, Jingjing Wang¹

¹State Key Laboratory of Chemo and Biosensing, College of Chemistry and Chemical Engineering, International Joint Lab of Energy Electrochemistry of the Ministry of Education, Hunan University, Changsha, 410082, China.

Angewandte Chemie (International ed. in English)

|September 5, 2025

まとめ

この研究は,効率的な一酸化炭素変換と高純度水素生成を可能にする,水ガスシフト反応 (WGSR) の新しい触媒を導入します. 電気化学で加速されたプロセスは持続可能な水素燃料の生成に有望な経路を提供します

科学分野:

電気化学
キャタリシス
材料科学

背景:

水ガスシフト反応 (WGSR) は水素生産に不可欠ですが,厳しい条件と浄化に課題があります.
現在の方法はしばしば複雑なセットアップを必要とし効率と純粋さで苦労します

研究の目的:

水・ガスシフト反応 (WGSR) の効率的で選択的な電解剤を開発する.
炭素一酸化物を同時に変換しながら高純度の水素を生産する.
高温ポリマー-電解質-膜電解剤における単原子触媒の使用を調査する.

主な方法:

高温ポリマー-電解質-膜電解剤で利用されたIrN4-RhN4双サイト単原子触媒 (IrRh-NC).
空間的に分離されたCOの変換とH2の生成を促進するために,WGSRを加速するために電気化学を用いた.
高温 (120~300°C) でシステムを操作し,質量移転を改善するために,ガスの状態で水を保持します.

主要な成果:

IrRh-NCで優れたCO触媒性能を達成し,0.4Vで424mAcm−2に達した.
高純度水素 (99.9%) を 3.2 ml min-1 の速度で生成した.
単一のIr原子がH2O解離を促進し,Rh部位がCO変換を促進し,粒子の触媒を上回ることを実証した.

結論:

IrRh-NC触媒は高温下でも効率的で選択的な WGSR を可能にします.
電気触媒は,同時にCOの変換と高純度H2の生成を可能にします.
このアプローチは,持続可能な水素経済の発展に向けた重要な前進です.

キーワード:

電気触媒水素の生産水とガスのシフト反応 (WGSR)

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