In Situ Investigation of Reversible Exsolution/Dissolution of CoFe Alloy Nanoparticles in a Co-Doped Sr2Fe1.5Mo0.5O6-delta Cathode for CO2 Electrolysis
Lv, Houfu1,2; Lin, Le1,3; Zhang, Xiaomin1; Song, Yuefeng1,2; Matsumoto, Hiroaki4; Zeng, Chaobin4; Ta, Na1; Liu, Wei1; Gao, Dunfeng1; Wang, Guoxiong1; Bao, Xinhe1
2020
Source PublicationADVANCED MATERIALS
ISSN0935-9648
EISSN1521-4095
Status已发表
DOI10.1002/adma.201906193
Abstract

Reversible exsolution and dissolution of metal nanoparticles in perovskite has been investigated as an efficient strategy to improve CO2 electrolysis performance. However, fundamental understanding with regard to the reversible exsolution and dissolution of metal nanoparticles in perovskite is still scarce. Herein, in situ exsolution and dissolution of CoFe alloy nanoparticles in Co-doped Sr2Fe1.5Mo0.5O6-delta (SFMC) revealed by in situ X-ray diffraction, scanning transmission electron microscopy, environmental scanning electron microscopy, and density functional theory calculations are reported. Under a reducing atmosphere, facile exsolution of Co promotes reduction of the Fe cation to generate CoFe alloy nanoparticles in SFMC, accompanied by structure transformation from double perovskite to layered perovskite at 800 degrees C. Under an oxidizing atmosphere, spherical CoFe alloy nanoparticles are first oxidized to flat CoFeOx nanosheets, and then dissolved into the bulk with structure evolution from layered perovskite back to double perovskite. Electrochemically, CO2 electrolysis performance can be retrieved during 12 redox cycles due to the regenerative ability of the CoFe alloy nanoparticles. The anchoring of the CoFe alloy nanoparticles in SFMC perovskite via reduction shows enhanced CO2 electrolysis performance and stability compared with the parent SFMC perovskite.

Keywordcarbon dioxide electrolysis cobalt-iron alloy nanoparticles reversible exsolution and dissolution Sr(2)Fe1 35Mo0 45Co0 2O6-delta perovskite
Indexed BySCI
Funding ProjectCAS Youth Innovation Promotion[2015145]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000505037200001
PublisherWILEY-V C H VERLAG GMBH
WOS KeywordELECTROCATALYTIC ACTIVITY ; PEROVSKITE ; PERFORMANCE ; CATALYST ; ANODE ; PD
Original Document TypeArticle
Citation statistics
Cited Times:50[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/104986
Collection物质科学与技术学院_博士生
Co-First AuthorLin, Le
Corresponding AuthorWang, Guoxiong
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Coll Energy, Beijing 100039, Peoples R China
3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
4.Hitachi High Technol Shanghai Co Ltd, Shanghai 201203, Peoples R China
Recommended Citation
GB/T 7714
Lv, Houfu,Lin, Le,Zhang, Xiaomin,et al. In Situ Investigation of Reversible Exsolution/Dissolution of CoFe Alloy Nanoparticles in a Co-Doped Sr2Fe1.5Mo0.5O6-delta Cathode for CO2 Electrolysis[J]. ADVANCED MATERIALS,2020.
APA Lv, Houfu.,Lin, Le.,Zhang, Xiaomin.,Song, Yuefeng.,Matsumoto, Hiroaki.,...&Bao, Xinhe.(2020).In Situ Investigation of Reversible Exsolution/Dissolution of CoFe Alloy Nanoparticles in a Co-Doped Sr2Fe1.5Mo0.5O6-delta Cathode for CO2 Electrolysis.ADVANCED MATERIALS.
MLA Lv, Houfu,et al."In Situ Investigation of Reversible Exsolution/Dissolution of CoFe Alloy Nanoparticles in a Co-Doped Sr2Fe1.5Mo0.5O6-delta Cathode for CO2 Electrolysis".ADVANCED MATERIALS (2020).
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