Surface lattice oxygen in transition‐metal oxides plays a vital role in catalytic processes. Mastering activation of surface lattice oxygen and identifying the activation mechanism are crucial for the development and design of advanced catalysts. A strategy is now developed to create a spinel Co₃O₄ /perovskite La_0.3Sr_0.7CoO₃ interface by in situ reconstruction of the surface Sr enrichment region in perovskite LSC to activate surface lattice oxygen. XAS and XPS confirm that the regulated chemical interface optimizes the hybridized orbital between Co 3d and O 2p and triggers more electrons in oxygen site of LSC transferred into lattice of Co₃O₄ , leading to more inactive O²⁻ transformed into active O^2−x. Furthermore, the activated Co₃O₄/LSC exhibits the best catalytic activities for CO oxidation, oxygen evolution, and oxygen reduction. This work would provide a fundamental understanding to explain the activation mechanism of surface oxygen sites.

中文翻译：

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Co3O4 / La0.3Sr0.7CoO3的尖晶石/钙钛矿界面的表面晶格氧活化的原子尺度见解

过渡金属氧化物中的表面晶格氧在催化过程中起着至关重要的作用。掌握表面晶格氧的活化作用并确定活化机理对于高级催化剂的开发和设计至关重要。现在正在开发一种策略，该方法通过在钙钛矿LSC中原位重建Sr富集区域以激活表面晶格氧来创建尖晶石Co ₃ O ₄  /钙钛矿La _0.3 Sr _0.7 CoO ₃界面。XAS和XPS证实，受调控的化学界面优化了Co 3d和O 2p之间的杂化轨道，并触发了LSC氧位中更多的电子转移到Co ₃ O _4的晶格中 ，导致多种非活性ö ^2-转化为活性ø ^{2- X}。此外，活化的Co ₃ O ₄ / LSC对CO氧化，放氧和氧还原表现出最佳的催化活性。这项工作将提供一个基本的理解，以解释表面氧位点的活化机理。