Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 37, Pages 15968-15973Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202006536
Keywords
atomic-scale insight; carbon dioxide electrolysis; metal-oxide interface; perovskite; reversible exsolution and dissolution
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Funding
- National Key R&D Program of China [2017YFA0700102]
- National Natural Science Foundation of China [21573222, 91545202]
- Dalian National Laboratory for Clean Energy [DNL180404]
- Dalian Institute of Chemical Physics [DICP DMTO201702]
- Dalian Outstanding Young Scientist Foundation [2017RJ03]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17020200]
- CAS Youth Innovation Promotion [Y201938]
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In situ exsolution of metal nanoparticles in perovskite under reducing atmosphere is employed to generate a highly active metal-oxide interface for CO(2)electrolysis in a solid oxide electrolysis cell. Atomic-scale insight is provided into the exsolution of CoFe alloy nanoparticles in La0.4Sr0.6Co0.2Fe0.7Mo0.1O3-delta(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(2)adsorption and activation, showing a higher CO(2)electrolysis performance than the LSCFM counterparts.
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