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Title: Solar-driven efficient methane catalytic oxidation over epitaxial ZnO/La0.8Sr0.2CoO3 heterojunctions

Abstract

Gas flaring in oil/gas drilling and gas leakage in natural gas power plant lead to significant energy loss and environmental burden. Here, solar-driven efficient methane oxidation was demonstrated under high velocity continuous flow over the ZnO/La0.8Sr0.2CoO3 (ZnO/LSCO) heterojunctions. The ZnO/LSCO heterojunctions enable a unique epitaxial hetero-interface, which effectively regulates the electron transfer between Zn 3d-O 2p hybrid orbital in ZnO and Co eg orbital in LSCO and promotes the rapid generation and refill of oxygen vacancy with unpaired electron (Vo), thus enhancing the activity and mobility of surface lattice oxygen in ZnO/LSCO. Under solar illumination, the synergy of photothermal and photocatalytic effect boosts the reversible electron transfer in the interface, which further activates surface lattice oxygen, resulting in a ~2 times higher methane oxidation activity. Such a solar-driven system not only enables a promising pathway for emitted methane utilization, but also provides an advanced catalyst design concept of epitaxial interface construction.

Authors:
 [1]; ORCiD logo [2];  [2];  [3];  [1]; ORCiD logo [4];  [3];  [3];  [3];  [2]; ORCiD logo [1];  [2];  [2];  [1]; ORCiD logo [3]
  1. Central China Normal Univ., Wuhan (China)
  2. National Univ. of Singapore (Singapore)
  3. Univ. of Connecticut, Storrs, CT (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1615183
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Applied Catalysis B: Environmental
Additional Journal Information:
Journal Volume: 265; Journal Issue: C; Journal ID: ISSN 0926-3373
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Solar-driven methane oxidation; Epitaxial hetero-interface; Reversible electron transfer; Photothermal effect; Photo-excited electrons

Citation Formats

Yang, Ji, Xiao, Wen, Chi, Xiao, Lu, Xingxu, Hu, Siyu, Wu, Zili, Tang, Wenxiang, Ren, Zheng, Wang, Sibo, Yu, Xiaojiang, Zhang, Lizhi, Rusydi, Andrivo, Ding, Jun, Guo, Yanbing, and Gao, Pu-Xian. Solar-driven efficient methane catalytic oxidation over epitaxial ZnO/La0.8Sr0.2CoO3 heterojunctions. United States: N. p., 2019. Web. doi:10.1016/j.apcatb.2019.118469.
Yang, Ji, Xiao, Wen, Chi, Xiao, Lu, Xingxu, Hu, Siyu, Wu, Zili, Tang, Wenxiang, Ren, Zheng, Wang, Sibo, Yu, Xiaojiang, Zhang, Lizhi, Rusydi, Andrivo, Ding, Jun, Guo, Yanbing, & Gao, Pu-Xian. Solar-driven efficient methane catalytic oxidation over epitaxial ZnO/La0.8Sr0.2CoO3 heterojunctions. United States. doi:10.1016/j.apcatb.2019.118469.
Yang, Ji, Xiao, Wen, Chi, Xiao, Lu, Xingxu, Hu, Siyu, Wu, Zili, Tang, Wenxiang, Ren, Zheng, Wang, Sibo, Yu, Xiaojiang, Zhang, Lizhi, Rusydi, Andrivo, Ding, Jun, Guo, Yanbing, and Gao, Pu-Xian. Tue . "Solar-driven efficient methane catalytic oxidation over epitaxial ZnO/La0.8Sr0.2CoO3 heterojunctions". United States. doi:10.1016/j.apcatb.2019.118469.
@article{osti_1615183,
title = {Solar-driven efficient methane catalytic oxidation over epitaxial ZnO/La0.8Sr0.2CoO3 heterojunctions},
author = {Yang, Ji and Xiao, Wen and Chi, Xiao and Lu, Xingxu and Hu, Siyu and Wu, Zili and Tang, Wenxiang and Ren, Zheng and Wang, Sibo and Yu, Xiaojiang and Zhang, Lizhi and Rusydi, Andrivo and Ding, Jun and Guo, Yanbing and Gao, Pu-Xian},
abstractNote = {Gas flaring in oil/gas drilling and gas leakage in natural gas power plant lead to significant energy loss and environmental burden. Here, solar-driven efficient methane oxidation was demonstrated under high velocity continuous flow over the ZnO/La0.8Sr0.2CoO3 (ZnO/LSCO) heterojunctions. The ZnO/LSCO heterojunctions enable a unique epitaxial hetero-interface, which effectively regulates the electron transfer between Zn 3d-O 2p hybrid orbital in ZnO and Co eg orbital in LSCO and promotes the rapid generation and refill of oxygen vacancy with unpaired electron (Vo), thus enhancing the activity and mobility of surface lattice oxygen in ZnO/LSCO. Under solar illumination, the synergy of photothermal and photocatalytic effect boosts the reversible electron transfer in the interface, which further activates surface lattice oxygen, resulting in a ~2 times higher methane oxidation activity. Such a solar-driven system not only enables a promising pathway for emitted methane utilization, but also provides an advanced catalyst design concept of epitaxial interface construction.},
doi = {10.1016/j.apcatb.2019.118469},
journal = {Applied Catalysis B: Environmental},
number = C,
volume = 265,
place = {United States},
year = {2019},
month = {11}
}

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This content will become publicly available on November 26, 2020
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