Bifunctional Water-Splitting Electrocatalysis Achieved by Defect Order in LaA2Fe3O8 (A = Ca, Sr)

被引：26

作者：

Karki, Surendra B. ^{[1
]}

Andriotis, Antonis N. ^{[2
]}

Menon, Madhu ^{[3
,4
]}

Ramezanipour, Farshid ^{[1
]}

机构：

[1] Univ Louisville, Dept Chem, Louisville, KY 40292 USA

[2] FORTH, Inst Elect Struct & Laser, Iraklion 71110, Greece

[3] Univ Louisville, Conn Ctr Renewable Energy Res, Louisville, KY 40292 USA

[4] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

来源：

ACS APPLIED ENERGY MATERIALS | 2021年 / 4卷 / 11期

基金：

美国国家科学基金会;

关键词：

electrocatalysis; water-splitting; bifunctional; structural order; OER; HER; OXYGEN EVOLUTION; PEROVSKITE OXIDE; ALKALINE; NANOPARTICLES; CATALYSIS; HYDROGEN;

D O I：

10.1021/acsaem.1c02028

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：

We report the utilization of defect order for development of a bifunctional oxide electrocatalyst. This structure-activity relationship is demonstrated through a disorder-order transformation in LaA2Fe3O8 (A = Ca, Sr). The defect-ordered oxide, LaCa2Fe3O8, shows electrocatalytic activity for oxygen evolution reaction, on par with that of the state-of-the-art precious metal catalyst RuO2. In addition, it is capable of catalyzing the other halfreaction of water-splitting, namely the hydrogen evolution reaction. Importantly, it is an iron-based catalyst and can be used as a single phase bulk material. The most important aspect of this work is the pronounced impact of defect order on the electrocatalytic properties of oxides.

引用

页码：12063 / 12066

页数：4

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