High-entropy spinel-structure oxides as oxygen evolution reaction electrocatalyst

被引：26

作者：

Stenzel, David ^{[1
]}

Zhou, Bei ^{[1
]}

Okafor, Chukwudalu ^{[2
]}

Kante, Mohana Veeraju ^{[1
]}

Lin, Ling ^{[1
]}

Melinte, Georgian ^{[1
,3
]}

Bergfeldt, Thomas ^{[4
]}

Botros, Miriam ^{[1
]}

Hahn, Horst ^{[1
,3
,5
]}

Breitung, Ben ^{[1
]}

Schweidler, Simon ^{[1
]}

机构：

[1] Karlsruhe Inst Technol KIT, Inst Nanotechnol, Karlsruhe, Germany

[2] Tech Univ Darmstadt, Dept Mat & Geosci, Darmstadt, Germany

[3] Helmholtz Inst Ulm Electrochem Energy Storage, Ulm, Germany

[4] Karlsruhe Inst Technol KIT, Inst Appl Mat Appl Mat Phys, Karlsruhe, Germany

[5] Tech Univ Darmstadt, Joint Res Lab Nanomat, Darmstadt, Germany

来源：

FRONTIERS IN ENERGY RESEARCH | 2022年 / 10卷

关键词：

high-entropy materials; high-entropy spinels; catalysis; oxygen evolution reaction; electrocatalyst; nebulized spray pyrolysis; PERFORMANCE; OXIDATION; CO3O4;

D O I：

10.3389/fenrg.2022.942314

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

High-entropy oxides are an upcoming research topic due to their broad range of possible crystal structures and applications. In this work, we want to present the change in the catalytic properties when using different elements to create a high-entropy spinel. Therefore, we used the nebulized-spray pyrolysis to synthesize the high-entropy spinel (Mn0.2Fe0.2Ni0.2Mg0.2Zn0.2)(3)O-4 and later on exchanged the Mg or the Zn with elements with multiple possible oxidation states, in our example each with Cr or Co. The phase purity, morphology, microstructure and homogeneity were investigated by XRD, SEM and STEM-EDX. Their electrocatalytic performance and stability was measured via oxygen evolution reaction and cyclic voltammetry and compared to IrO2, used as reference. The best performance of the synthesized materials was achieved by (Mn0.2Fe0.2Ni0.2Mg0.2Cr0.2)(3)O-4.

引用

页数：11

共 47 条

[11] Understanding Catalytic Activity Trends in the Oxygen Reduction Reaction [J].