Oxygen defect engineering by the current effect assisted with temperature cycling in a perovskite-type La0.7Sr0.3CoO3 film
文献类型：期刊论文
| 作者 | Li, J.; Wang, J.; Kuang, H.; Zhang, H. R.; Zhao, Y. Y.; Qiao, K. M.; Wang, F.; Liu, W.; Wang, W.; Peng, L. C. |
| 刊名 | ROYAL SOC CHEMISTRY
 |
| 出版日期 | 2017-09-21 |
| 卷号 | 9期号:35页码:13214-13221 |
| ISSN号 | 2040-3364 |
| 英文摘要 | Introducing and modulating the oxygen deficiency concentration have been received as an effective way to obtain high catalytic activity in perovskite oxides. However, it is difficult to control the oxygen vacancy in conventional oxygen defect engineering due to harsh reaction conditions at elevated temperatures and the reducing atmosphere, which make it impractical for many technological applications. Herein, we report a new approach to oxygen defect engineering based on the combination of the current effect and temperature cycling at low temperature. Our investigations revealed that the electrical conductivity of the (011)-La0.7Sr0.3CoO3/PMN-PT film changes continuously from metallicity to insulativity under repeated transport measurements below room temperature, which indicates the transformation of the Co4+ state to Co3+ in the film. Further experiments and analysis revealed that oxygen vacancies can be well regulated by the combined current effect and temperature cycling in repeated measurements, which results in a decrease of Co4+/Co3+ and thus the remarkable variation of conductive properties of the film. Our work provides a simple and highly efficient method to engineer oxygen vacancies in perovskite-type oxides and brings new opportunities in designing high-efficiency oxidation catalysts.; Introducing and modulating the oxygen deficiency concentration have been received as an effective way to obtain high catalytic activity in perovskite oxides. However, it is difficult to control the oxygen vacancy in conventional oxygen defect engineering due to harsh reaction conditions at elevated temperatures and the reducing atmosphere, which make it impractical for many technological applications. Herein, we report a new approach to oxygen defect engineering based on the combination of the current effect and temperature cycling at low temperature. Our investigations revealed that the electrical conductivity of the (011)-La0.7Sr0.3CoO3/PMN-PT film changes continuously from metallicity to insulativity under repeated transport measurements below room temperature, which indicates the transformation of the Co4+ state to Co3+ in the film. Further experiments and analysis revealed that oxygen vacancies can be well regulated by the combined current effect and temperature cycling in repeated measurements, which results in a decrease of Co4+/Co3+ and thus the remarkable variation of conductive properties of the film. Our work provides a simple and highly efficient method to engineer oxygen vacancies in perovskite-type oxides and brings new opportunities in designing high-efficiency oxidation catalysts. |
| 学科主题 | Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied |
| 语种 | 英语 |
| 资助机构 | National Key Research and Development Program of China [2017YFA0303601, 2017YFB0702702, 2014CB643700, 2016YFB0700903, 2016YFA0300701]; National Natural Sciences Foundation of China [11474341, 51531008, 11674378, 51590880]; Key Program and Strategic Priority Research Program of the Chinese cademy of Sciences |
| 公开日期 | 2018-01-10 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79089]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wang, J; Hu, FX (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.; Hu, FX (reprint author), Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China.; Hu, FX (reprint author), Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Li, J.,Wang, J.,Kuang, H.,et al. Oxygen defect engineering by the current effect assisted with temperature cycling in a perovskite-type La0.7Sr0.3CoO3 film[J]. ROYAL SOC CHEMISTRY,2017,9(35):13214-13221. |
| APA | Li, J..,Wang, J..,Kuang, H..,Zhang, H. R..,Zhao, Y. Y..,...&Hu, FX .(2017).Oxygen defect engineering by the current effect assisted with temperature cycling in a perovskite-type La0.7Sr0.3CoO3 film.ROYAL SOC CHEMISTRY,9(35),13214-13221. |
| MLA | Li, J.,et al."Oxygen defect engineering by the current effect assisted with temperature cycling in a perovskite-type La0.7Sr0.3CoO3 film".ROYAL SOC CHEMISTRY 9.35(2017):13214-13221. |
入库方式： OAI收割
来源：金属研究所
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