酸素不足のストレート・チューニングによるペロブスキート電解の強化

Jonathan R Petrie¹, Hyoungjeen Jeen¹, Sara C Barron²

¹Materials Science and Technology Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.

Journal of the American Chemical Society

|May 28, 2016

まとめ

ストロンチウムコバルチート膜のエピタキシアルストレンは,より低い温度で酸素の空隙を生み出します. これは貴金属触媒に匹敵するエネルギー用途の触媒活性を大幅に高めます

科学分野:

材料科学
カタリシス
エネルギー貯蔵と発電

背景:

移行金属酸化物における酸素の空白は,エネルギーアプリケーションにおける触媒に不可欠です.
バッテリーや燃料電池などの装置の低温での空白の達成は依然として課題です.

研究の目的:

酸素含量と空白を制御するために,ストロンチウムコバルチート (SrCoOx) の薄膜における表層張りの使用を調査する.
低温で酸素進化反応のためのSrCoOxの触媒活性を強化する.

主な方法:

ストロンチウムコバルチート (SrCoOx) 薄膜の製造
酸素進化反応に関連する条件下で,酸素ステキオメトリーを操作するために,上軸のストレスを適用する.
誘導された酸素空位による触媒活性増強の測定

主要な成果:

張力ストレスは,酸化環境でも,SrCoOxフィルムに酸素不足状態を誘導します.
ストレスを制御した酸素の空白の存在は,酸素の進化反応の触媒的活性を数倍以上増加させた.
圧縮されたSrCoOxの強化された活動は,IrO2のような貴金属触媒と一致しました.

結論:

エピタキシアルストレスは,酸素ステキオメトリーと酸化物の空隙を環境条件から独立して正確に制御します.
このストレスエンジニアリングのアプローチは低温での触媒を可能にしますこれは実用的なエネルギー装置にとって不可欠です
この発見は,エネルギー貯蔵と生成のための非貴金属の効率的な触媒の開発への道を開く.

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