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Facilitating room-temperature oxygen ion migration via Co-O bond activation in cobaltite films
Wang, Qian1; Gu, Youdi2; Yin, Siqi1; Sun, Yiming1; Liu, Wei2; Zhang, Zhidong2; Pan, Feng1; Song, Cheng1
Corresponding AuthorGu, Youdi(ydgu14b@imr.ac.cn) ; Song, Cheng(songcheng@mail.tsinghua.edu.cn)
2021-11-11
Source PublicationNANOSCALE
ISSN2040-3364
Volume13Issue:43Pages:18256-18266
AbstractOxygen 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.
Funding OrganizationBeijing 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
DOI10.1039/d1nr03801j
Indexed BySCI
Language英语
Funding ProjectBeijing 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 Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000712453200001
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167150
Collection中国科学院金属研究所
Corresponding AuthorGu, Youdi; Song, Cheng
Affiliation1.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
Recommended Citation
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.
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