Integrating the cationic engineering and hollow structure engineering into perovskites oxides for efficient and stable electrocatalytic oxygen evolution

被引：36

作者：

Zhang, Lingling ^{[1
]}

Zhu, Han ^{[1
]}

Hao, Jiace ^{[1
]}

Wang, Can ^{[1
]}

Wen, Yankun ^{[1
]}

Li, Huining ^{[1
]}

Lu, Shuanglong ^{[1
]}

Duan, Fang ^{[1
]}

Du, Mingliang ^{[1
]}

机构：

[1] Jiangnan Univ, Sch Chem & Mat Engn, Key Lab Synthet & Biol Colloids, Minist Educ, Wuxi 214122, Jiangsu, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2019年 / 327卷

基金：

中国国家自然科学基金;

关键词：

Perovskite oxides; Cationic substitution; Doping engineering; Water splitting; Structure engineering; NANOPARTICLES; NANOSTRUCTURES; PERFORMANCE; REDUCTION; COMPOSITE; CATALYSTS; GRAPHENE;

D O I：

10.1016/j.electacta.2019.135033

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Designing highly efficient oxygen evolution reaction (OER) electrocatalysts from nanoscale level has sparked great interest in several important catalytic reactions, such as water splitting, metal-air batteries, and regenerative fuel cells. Herein, we have reported an effective strategy for designing one-dimensional perovskite oxides with unique hollow nanostructures by combining an electrospinning technology and high temperature carbonization and oxidation. The LaCoO3 (LC) was used as the model catalyst and the La0.6Sr0.4CoO3 (LSC) and La0.6Sr0.4Co0.8Fe0.2O3 (LSCF) hollow nanofibers were synthesized through the A-site and AB-site doping engineering. The building block perovskite oxides nanoparticles connected with each other along one direction and formed a one-dimensional (1D) hollow nanofibers with hierarchical architectures. The one-dimensional perovskite oxide nanofibers can be tailored from porous hollow structures to solid nanofibers by adjusting the temperatures and the A, B site doping. Compared with the LC (444 mV) and the LSC (426 mV), the LSCF demonstrated the superior OER activity with overpotential of 353 mV (10 mA cm(-2)), suggesting the enhanced activity by the AB-site doping engineering. A series of LSCF electrocatalysts were prepared at different carbonization and oxidation conditions and the La0.6Sr0.4Co0.8Fe0.2O3 prepared at 700 degrees C obtained the best catalytic performance and exceptional durability. This strategy provides an effective approach to design advanced perovskite oxides catalysts with superior activity and stability. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：11

共 40 条

[1] Synergistic interaction of perovskite oxides and N-doped graphene in versatile electrocatalyst [J].