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Atomic-Scale Insight into Exsolution of CoFe Alloy Nanoparticles in La 0.4 Sr 0.6 Co 0.2 Fe 0.7 Mo 0.1 O 3-δ with Efficient CO 2 Electrolysis.
- Source :
-
Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2020 Sep 07; Vol. 59 (37), pp. 15968-15973. Date of Electronic Publication: 2020 Jun 25. - Publication Year :
- 2020
-
Abstract
- In situ exsolution of metal nanoparticles in perovskite under reducing atmosphere is employed to generate a highly active metal-oxide interface for CO <subscript>2</subscript> electrolysis in a solid oxide electrolysis cell. Atomic-scale insight is provided into the exsolution of CoFe alloy nanoparticles in La <subscript>0.4</subscript> Sr <subscript>0.6</subscript> Co <subscript>0.2</subscript> Fe <subscript>0.7</subscript> Mo <subscript>0.1</subscript> O <subscript>3-δ</subscript> (LSCFM) by in situ scanning transmission electron microscopy (STEM) with energy-dispersive X-ray spectroscopy and DFT calculations. The doped Mo atoms occupy B sites of LSCFM, which increases the segregation energy of Co and Fe ions at B sites and improves the structural stability of LSCFM under a reducing atmosphere. In situ STEM measurements visualized sequential exsolution of Co and Fe ions, formation of CoFe alloy nanoparticles, and reversible exsolution and dissolution of CoFe alloy nanoparticles in LSCFM. The metal-oxide interface improves CO <subscript>2</subscript> adsorption and activation, showing a higher CO <subscript>2</subscript> electrolysis performance than the LSCFM counterparts.<br /> (© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Details
- Language :
- English
- ISSN :
- 1521-3773
- Volume :
- 59
- Issue :
- 37
- Database :
- MEDLINE
- Journal :
- Angewandte Chemie (International ed. in English)
- Publication Type :
- Academic Journal
- Accession number :
- 32452143
- Full Text :
- https://doi.org/10.1002/anie.202006536