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高効率の酸化脱水化のためのサイトで原子的に分散したメイングループ触媒

Chaojie Wang^1,2, Yujia Han^1,2, Ming Tian¹

¹CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People's Republic of China.

Journal of the American Chemical Society

|August 25, 2022

まとめ

この研究は,選択的なエタンをエテンに変換するためのメイングループインジウム酸化物を活性化し,高いエテン収量を達成します. 新しい触媒の設計は,酸化脱水化触媒における伝統的な移行金属酸化物の限界を克服します.

科学分野:

カタリシス
材料科学
化学工学

背景:

移行金属酸化物は,酸化脱水化のための効果的なアルケンの活性化剤であるが,アルケンの出力が低い.
重要な課題は,変換と選択性の間のトレードオフであり,触媒の最適化を妨げています.

研究の目的:

主群インジウム酸化物を選択的酸化脱水化のために活性化することによってアルケンの出力の制限を克服する.
メイングループ要素を使用して選択的酸化触媒を設計する.

主な方法:

原子的に分散したインジウム部位 ([InOH]2+) は,HYゼオライトのスーパーケージ内に固定された.
エタンの酸化脱水化に対する触媒的活性が評価された.
孤立した[InOH]2+部位は,H2Oの局所形成により安定した.

主要な成果:

設計されたインジウム触媒は,80%のエタンの変換で80%のエタンの選択性を達成し,60%のエタンを生成しました.
孤立した[InOH]2+サイトは,支持されたIn2O3よりも著しく高い活性を示した.
触媒の設計は最先端の過渡金属酸化物触媒を上回った.

結論:

メイングループインジウム酸化物は,高度に選択的な酸化脱水化のために活性化することができる.
この研究は,主グループ要素を触媒で利用するための新しいアプローチを提示しています.
この研究は,選択的酸化における合理的な触媒設計の道を開く.

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