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
收藏
页码：9292 / 9296
页数：5
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