One-pot fabrication of yolk-shell structured La0.9Sr0.1CoO3 perovskite microspheres with enhanced catalytic activities for oxygen reduction and evolution reactions

被引：77

作者：

Bie, Shiyu ^{[1
,2
]}

Zhu, Yongqiang ^{[1
,2
,3
]}

Su, Jianmin ^{[1
,2
]}

Jin, Chao ^{[1
,2
,4
]}

Liu, Shanhu ^{[3
]}

Yang, Ruizhi ^{[1
,2
]}

Wu, Jiao ^{[1
,2
]}

机构：

[1] Soochow Univ, Coll Phys Optoelect & Energy, Suzhou 215006, Peoples R China

[2] Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China

[3] Henan Univ, Coll Chem & Chem Engn, Inst Environm & Analyt Sci, Kaifeng 475004, Peoples R China

[4] S China Univ Technol, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510640, Guangdong, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 44期

基金：

中国国家自然科学基金;

关键词：

LITHIUM-AIR; BIFUNCTIONAL CATALYST; ELECTROCHEMICAL PROPERTIES; EFFICIENT ELECTROCATALYST; OXIDE; CATHODE; NANOPARTICLES; PERFORMANCE; NANOTUBES; NANORODS;

D O I：

10.1039/c5ta05271h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：22448 / 22453

页数：6

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