Oxygen defect engineering by the current effect assisted with temperature cycling in a perovskite-type La0.7Sr0.3CoO3 film

IMR OpenIR

	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
发表期刊	ROYAL SOC CHEMISTRY
ISSN	2040-3364
卷号	9 期号:35 页码:13214-13221
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.
部门归属	[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
学科领域	Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
资助者	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
收录类别	SCI
语种	英语
WOS记录号	WOS:000410659800048
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79089
专题	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.