H2貯蔵材料 (22 KJ/mol) は,有機金属のTi断片をシグマ-H2結合部位として使用しています
Ahmad Hamaed1, Michel Trudeau, David M Antonelli
1Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
Journal of the American Chemical Society
|May 9, 2008
まとめ
メソポラスシリカに挿入された新しい低調整チタン (III) 材料は,重要な水素貯蔵能力を示しています. これらの材料は,シグマ-H2結合が強く,環境温度での車両の水素貯蔵を潜在的に強化します.
科学分野:
- マテリアルサイエンス 材料科学
- 無機化学 無機化学とは
- 化学工学は化学工学というものです.
背景:
- 効率的な水素貯蔵材料の開発は,クリーンエネルギー技術の進歩に不可欠です.
- 既存の方法は,容量,安定性,または動作条件に関する課題に直面することが多い.
研究 の 目的:
- 強化された水素貯蔵のためのメソポラスシリカの低座標チタン (III) 断片を合成し,特徴づけること.
- 先駆体タイプと負荷の関数として水素貯蔵容量と結合特性を調査する.
主な方法:
- トライ・テトラベンジルチタニウム (III) 前駆物質をメソポラスシリカに挿入する.
- 水素貯蔵容量を様々な温度と圧力でテストする.
- 吸着イソテルムと結合エンタルピーを分析する.
主要な成果:
- テトラベンジルTi前駆物の最適な負荷は,196°Cと100 atmで21.45 wt %の水素貯蔵をもたらしました.
- 22.15 kJ/molまでのエンタルピーで強力なシグマ-H2結合を達成し,室温性能に適しています.
- 25°CでTi中心あたり1.1 H2の保持が実証されています.
結論:
- メソポラスシリカの低調整のTi (III) 断片は,高容量水素貯蔵に有望である.
- H2のクバスの結合は,環境温度での水素貯蔵アプリケーションに有効な経路を提供します.
- このアプローチは,現在の高圧水素貯蔵シリンダー容量を大幅に改善する可能性がある.
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