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Oxygen defect engineering by the current effect assisted with temperature cycling in a perovskite-type La0.7Sr0.3CoO3 film
Li, J.; Wang, J.; Kuang, H.; Zhang, H. R.; Zhao, Y. Y.; Qiao, K. M.; Wang, F.; Liu, W.; Wang, W.; Peng, L. C.; Zhang, Y.; Yu, R. C.; Hu, F. X.; Sun, J. R.; Shen, B. G.; 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.
2017-09-21
Source PublicationROYAL SOC CHEMISTRY
ISSN2040-3364
Volume9Issue:35Pages:13214-13221
AbstractIntroducing 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.
description.department[li, j. ; wang, j. ; kuang, h. ; zhang, h. r. ; zhao, y. y. ; qiao, k. m. ; wang, w. ; peng, l. c. ; zhang, y. ; yu, r. c. ; hu, f. x. ; sun, j. r. ; shen, b. g.] chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100190, peoples r china ; [li, j. ; wang, j. ; kuang, h. ; zhang, h. r. ; zhao, y. y. ; qiao, k. m. ; wang, w. ; peng, l. c. ; zhang, y. ; yu, r. c. ; hu, f. x. ; sun, j. r. ; shen, b. g.] chinese acad sci, inst phys, state key lab magnetism, beijing 100190, peoples r china ; [li, j. ; wang, j. ; kuang, h. ; zhang, h. r. ; zhao, y. y. ; qiao, k. m. ; wang, w. ; peng, l. c. ; zhang, y. ; yu, r. c. ; hu, f. x. ; sun, j. r. ; shen, b. g.] univ chinese acad sci, sch phys sci, beijing 100049, peoples r china ; [wang, f. ; liu, w.] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, liaoning, peoples r china
Subject AreaChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
Funding OrganizationNational 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
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79089
Collection中国科学院金属研究所
Corresponding AuthorWang, 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.
Recommended Citation
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.
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