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Title: Atomic-Scale Insights into Surface Lattice Oxygen Activation at the Spinel/Perovskite interface of Co 3O 4/La 0.3Sr 0.7CoO 3

Abstract

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 Co 3O 4 /perovskite La 0.3Sr 0.7CoO 3 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 Co 3O 4, leading to more inactive O 2- transformed into active O 2-x. Furthermore, the activated Co 3O 4/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.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [2];  [2];  [1];  [1]; ORCiD logo [1]
  1. Jilin Univ., Changchun (China)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE; National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1546793
Grant/Contract Number:  
AC02-76SF00515; 21427802; 21671076; 21621001; 21831003; 3102018bzc007; 10183201816
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; electron transfer; electronic structure; perovskite; spinels; surface lattice oxygen

Citation Formats

Wang, Xiyang, Pan, Ziye, Chu, Xuefeng, Huang, Keke, Cong, Yingge, Cao, Rui, Sarangi, Ritimukta, Li, Liping, Li, Guangshe, and Feng, Shouhua. Atomic-Scale Insights into Surface Lattice Oxygen Activation at the Spinel/Perovskite interface of Co3O4/La0.3Sr0.7CoO3. United States: N. p., 2019. Web. doi:10.1002/anie.201905543.
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 Co3O4/La0.3Sr0.7CoO3. United States. doi:10.1002/anie.201905543.
Wang, Xiyang, Pan, Ziye, Chu, Xuefeng, Huang, Keke, Cong, Yingge, Cao, Rui, Sarangi, Ritimukta, Li, Liping, Li, Guangshe, and Feng, Shouhua. Sat . "Atomic-Scale Insights into Surface Lattice Oxygen Activation at the Spinel/Perovskite interface of Co3O4/La0.3Sr0.7CoO3". United States. doi:10.1002/anie.201905543.
@article{osti_1546793,
title = {Atomic-Scale Insights into Surface Lattice Oxygen Activation at the Spinel/Perovskite interface of Co3O4/La0.3Sr0.7CoO3},
author = {Wang, Xiyang and Pan, Ziye and Chu, Xuefeng and Huang, Keke and Cong, Yingge and Cao, Rui and Sarangi, Ritimukta and Li, Liping and Li, Guangshe and Feng, Shouhua},
abstractNote = {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 La0.3Sr0.7CoO3 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 O2-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.},
doi = {10.1002/anie.201905543},
journal = {Angewandte Chemie (International Edition)},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}

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Works referenced in this record:

O-K and Co-L XANES Study on Oxygen Intercalation in Perovskite SrCoO3-δ
journal, January 2010

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A Bifunctional Nonprecious Metal Catalyst for Oxygen Reduction and Water Oxidation
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