Atomic-Scale Insights into Surface Lattice Oxygen Activation at the Spinel/Perovskite interface of Co3 O4 /La0.3 Sr0.7 CoO3.

Wang, Xiyang; Pan, Ziye; Chu, Xuefeng; Huang, Keke; Cong, Yingge; Cao, Rui; Sarangi, Ritimukta; Li, Liping; Li, Guangshe; Feng, Shouhua

Atomic-Scale Insights into Surface Lattice Oxygen Activation at the Spinel/Perovskite interface of Co₃ O₄ /La_0.3 Sr_0.7 CoO₃.

Wang, Xiyang; Pan, Ziye; Chu, Xuefeng; Huang, Keke; Cong, Yingge; Cao, Rui; Sarangi, Ritimukta; Li, Liping; Li, Guangshe; Feng, Shouhua.

Afiliación

Wang X; State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Pan Z; State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Chu X; Jilin Provincial Key Laboratory of Architectural Electricity & Comprehensive Energy Saving, School of Electrical and Electronic Information Engineering, Jilin Jianzhu University, Changchun, 130118, P. R. China.
Huang K; State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Cong Y; State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Cao R; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.
Sarangi R; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.
Li L; State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Li G; State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Feng S; State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.

Angew Chem Int Ed Engl ; 58(34): 11720-11725, 2019 Aug 19.

Article en En | MEDLINE | ID: mdl-31228315

RESUMEN

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 Co3 O4 /perovskite La0.3 Sr0.7 CoO3 interface by inâsitu 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 Coâ3d and Oâ2p and triggers more electrons in oxygen site of LSC transferred into lattice of Co3 O4 , leading to more inactive O2- transformed into active O2-x . Furthermore, the activated Co3 O4 /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.

Palabras clave

electron transfer; electronic structure; perovskite; spinels; surface lattice oxygen

Texto completo

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Buscar en Google