High-Entropy Spinel Oxide Nanoparticles Synthesized via Supercritical Hydrothermal Processing as Oxygen Evolution Electrocatalysts

被引：36

作者：

Iwase, Kazuyuki ^{[1
]}

Honma, Itaru ^{[1
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

来源：

ACS APPLIED ENERGY MATERIALS | 2022年 / 5卷 / 08期

关键词：

non-noble-metal; supercritical fluid processing; nanoparticles; high-entropy oxide; one-pot synthesis; RAY-ABSORPTION SPECTROSCOPY; MN; NANOSHEETS; FERRITES; METAL;

D O I：

10.1021/acsaem.2c01751

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：

High-entropy spinel oxides (HE-SOs) with the first five transition metal elements were synthesized using a simple one-pot supercritical hydrothermal fluid processing method. Solid-solution cubic spinel oxide nanoparticles (average diameter = 18.6 nm) were successfully synthesized. The overpotential for the electrochemical oxygen evolution reaction (OER) on HE-SOs was 330 mV (at 10 mA cm-2 in 1 M KOH), and the value of the Tafel slope was 36.7 mV dec(-1), demonstrating that the HE-SO functioned as an efficient OER catalyst. This work can provide a simple synthesis strategy for multimetal elements containing oxides for a variety of catalytic reactions and applications.

引用

页码：9292 / 9296

页数：5

共 30 条

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