期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 44, 页码 22448-22453出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta05271h
关键词
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资金
- National Natural Science Foundation of China [51272167, 21206101]
- Natural Science Foundation of Jiangsu Province, China [BK20141199]
- Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China [14KJB480005]
- Key Laboratory of Fuel Cell Technology of Guangdong Province
Efficient electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) play a critical role in the performance of fuel cells and metal-air batteries. In this work, we report a one-pot fabrication pathway to prepare yolk-shell structured La0.9Sr0.1CoO3 perovskite microspheres as highly active electrocatalysts for the ORR. The shell number could be controlled by using different solvents. Compared with regular La0.9Sr0.1CoO3 particles, yolk-shell structured La0.9Sr0.1CoO3 oxides have larger specific surface area. Catalytic activities of the as-prepared catalysts for the ORR and OER in 0.1 M KOH media have been studied by using a rotating ring-disk electrode (RRDE) technique. RRDE results show that multi-shelled La0.9Sr0.1CoO3 exhibits better catalytic activity for the ORR and OER with durabilities superior to commercial Pt/C catalysts.
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