Hollow spherical La0.8Sr0.2Mn0.3 perovskite oxide with enhanced catalytic activities for the oxygen reduction reaction

被引：74
|
作者：
Lu, Fanliang [1 ,2 ]
Sui, Jing [3 ]
Su, Jianmin [1 ,2 ]
Jin, Chao [1 ,2 ]
Shen, Ming [4 ]
Yang, Ruizhi [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] Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266042, Peoples R China
[4] Huasheng Chem Corp, Zhangjiagang 215635, Jiangsu, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2014年 / 271卷
基金：
中国国家自然科学基金;
关键词：
Oxygen reduction reaction; Catalyst; Perovskite oxide; Hollow sphere; METAL-AIR BATTERIES; FACILE SYNTHESIS; ALKALINE-MEDIUM; CATHODE; ELECTROCATALYSTS; NANOPARTICLES; LITHIUM;
D O I：
10.1016/j.jpowsour.2014.07.160
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：
A hollow spherical La0.8Sr0.2MnO3 (HS-LSM) perovskite oxide has been prepared using a new carbonate-template route, and characterized by XRD, SEM and TEM. SEM and TEM results show that the preprepared oxides consist of porous microspheres composed of submicrometer-sized subunits with a secondary particle diameter of similar to 20-50 nm. The catalytic activity of the oxide for the oxygen reduction reaction (ORR) in 0.1 M KOH solution has been studied using a rotating ring-disk electrode (RRDE). In the ORR tests, a maximum cathodic current density of 6.4 mA cm(-2) at -0.9 V (vs. Ag/AgCl) with 2500 rpm has been obtained, and the ORR mainly favors a direct four-electron pathway. The chronoamperometric test shows that the HS-LSM exhibits excellent stability for the ORR. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：55 / 59
页数：5
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