Surface protonation and oxygen evolution activity of epitaxial La1−xSrxCoO3 thin films

被引：0
作者：
XiaoShuo Wang
Liang Zhou
MengXin Li
Yi Luo
TieYing Yang
TianLi Wu
XiaoLong Li
Kui-Juan Jin
Er-Jia Guo
LiFen Wang
XueDong Bai
WeiFeng Zhang
HaiZhong Guo
机构：
[1] Henan University,Henan Key Laboratory of Photovoltaic Materials, School of Physics and Electronics
[2] Zhengzhou University,School of Physics and Microelectronics
[3] Shanghai Institute of Applied Physics,Shanghai Synchrotron Radiation Facility (SSRF)
[4] Chinese Academy of Sciences,Beijing National Laboratory for Condensed Matter Physics
[5] Institute of Physics,Center of Materials Science and Optoelectronics Engineering
[6] Chinese Academy of Sciences,Collaborative Innovation Center of Light Manipulations and Applications
[7] University of Chinese Academy of Sciences,undefined
[8] Shandong Normal University,undefined
来源：
Science China Physics, Mechanics & Astronomy | 2020年 / 63卷
关键词：
oxygen evolution reaction; La; Sr; CoO; thin films; lattice oxygen protonation; 82.45.Jn; 73.90.+f; 82.65.+r;
D O I：
暂无
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学科分类号：
摘要：
As an alternative electrode material, transition metal oxides are promising candidates due to multivalent nature and oxygen vacancies present in the structure with facilitate redox reactions. The aim of this study is to explore the intrinsic mechanism of oxygen evolution reaction (OER) using two-dimensional thin film La1−xSrxCoO3 electrode as a model. Herein, we report a planar two-dimensional model La1−xSrxCoO3 electrode grown on a Nb-SrTiO3 single-crystal substrate via pulsed laser deposition. The two-dimensional La1−xSrxCoO3 films offer different oxygen evolution activities at different pH electrolyte solutions. The mechanisms behind the variations of the oxygen evolution activity were discussed after comparing the oxygen evolution activity before and after treatments of the electrodes and measurements by various test methods. The results of this study offer a promising, low-cost electrode material for the efficient OER and a sustainable production of hydrogen fuel.
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