安定した低温 H2生成触媒は,α-MoC に Pt を混ぜて生成する
Xiao Zhang1,2, Mengtao Zhang1, Yuchen Deng1
1Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing, China.
Nature
|January 21, 2021
まとめ
低温で水とガスのシフト反応で 効率的に水素を生成する 新しいプラチナ触媒を開発しました この耐久性の高い触媒は 清潔なエネルギーの生産に 有望な経路を提供します
科学分野:
- カタリシス
- 材料科学
- エネルギー生産
背景:
- 水ガスシフト反応は,工業用水素生産に不可欠です.
- 低温での効率的なWGS触媒は燃料電池の用途に不可欠です.
- 既存の触媒は低温で必要な耐久性と活性性に欠けていることが多い.
研究 の 目的:
- 低温でのWGS反応のための高度に活性で安定した触媒を開発する.
- モリブデン炭化物のプラチナ原子とクラスターを含む新しい触媒構造を調査する.
- 反応機構を理解し,触媒の安定に寄与する要因を特定する.
主な方法:
- 単離プラチナ原子 (Pt1) と亜ナノメートルプラチナクラスター (Ptn) をα-モリブデン炭化物 (α-MoC) に安定させる (Pt1-Ptn) /α-MoC触媒構造の合成.
- ケルビン313で WGS反応で触媒の性能をテストする.
- 直接の一酸化炭素解離を含む,触媒構造の特徴と水素生成経路の識別.
主要な成果:
- (Pt1-Ptn) /α-MoC触媒は,313 KでWGS反応に高い活性を示した.
- 直接的な一酸化炭素解離を含む水素生成経路が特定された.
- 触媒は,サポート酸化を防ぐために高い安定性を示し,4,300,000mol H2/mol Ptの高い金属正常化回転数を達成した.
結論:
- 孤立したプラチナ原子とクラスタをα-モリブデン炭化物で安定させることは,活性で安定したWGS触媒を開発するための重要な戦略です.
- 設計された触媒は,以前のシステムの限界を克服し,優れた性能と耐久性を示しています.
- このアプローチは,効率的な水と一酸化炭素の活性化によるエネルギー生産のための高度な触媒の設計に不可欠であると予想されています.
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