Facilitating room-temperature oxygen ion migration via Co-O bond activation in cobaltite films

doi:10.1039/d1nr03801j

IMR OpenIR

	Facilitating room-temperature oxygen ion migration via Co-O bond activation in cobaltite films
	Wang, Qian 1; Gu, Youdi 2; Yin, Siqi 1; Sun, Yiming 1; Liu, Wei 2; Zhang, Zhidong 2; Pan, Feng 1; Song, Cheng 1
通讯作者	Gu, Youdi(ydgu14b@imr.ac.cn) ; Song, Cheng(songcheng@mail.tsinghua.edu.cn)
	2021-11-11
发表期刊	NANOSCALE
ISSN	2040-3364
卷号	13 期号:43 页码:18256-18266
摘要	Oxygen ion migration in strongly correlated oxides can cause dramatic changes in the crystal structure, chemical and magnetoelectric properties, which holds promising for a wide variety of applications in catalysis, energy conversion, and electronics. However, the high strength and stability of metal-oxygen (M-O) bonds cause a large thermodynamic barrier for oxygen migration. Here, we designed Co-O bond activation in cobaltite (SrCoOx) films by Au-nanodot-decoration. Charge transfer from Au to SrCoOx effectively weakens the Co-O bond, meanwhile Co-O-Au synergistic bonding remarkably decreases the migration barrier of oxygen ions. Fast oxygen evolution occurs at the perimeter of the Au/SrCoOx interface, and the chemical potential gradient of O2- drives inner ion diffusion to the surface. Consequently, bias-free topotactic phase reduction from perovskite SrCoO3-delta to brownmillerite SrCoO2.5 has been achieved at room temperature. Our finding explores a new dimension to accelerate oxygen ion kinetics in transition-metal oxides from the aspect of interfacial bond activation, which is significant for developing oxide/noble-metal interfaces for high-efficiency ion migration and redox catalysis at low temperature.
资助者	Beijing Innovation Center for Future Chip (ICFC), Tsinghua University ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; Natural Science Foundation of Beijing, China
DOI	10.1039/d1nr03801j
收录类别	SCI
语种	英语
资助项目	Beijing Innovation Center for Future Chip (ICFC), Tsinghua University ; National Key Research and Development Program of China[2016YFA0203800] ; National Natural Science Foundation of China[51871130] ; Natural Science Foundation of Beijing, China[JQ20010]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000712453200001
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：9[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/321006/167150
专题	中国科学院金属研究所
通讯作者	Gu, Youdi; Song, Cheng
作者单位	1.Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat MOE, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qian,Gu, Youdi,Yin, Siqi,et al. Facilitating room-temperature oxygen ion migration via Co-O bond activation in cobaltite films[J]. NANOSCALE,2021,13(43):18256-18266.
APA	Wang, Qian.,Gu, Youdi.,Yin, Siqi.,Sun, Yiming.,Liu, Wei.,...&Song, Cheng.(2021).Facilitating room-temperature oxygen ion migration via Co-O bond activation in cobaltite films.NANOSCALE,13(43),18256-18266.
MLA	Wang, Qian,et al."Facilitating room-temperature oxygen ion migration via Co-O bond activation in cobaltite films".NANOSCALE 13.43(2021):18256-18266.