Ultrasound-Assisted Synthesis of High-Entropy Materials for Enhanced Oxygen Evolution Electrocatalysis

High-entropy materials (HEMs) play a significant role in the electrocatalytic oxygen evolution reaction (OER) due to their unique properties. However, there are still challenges in the preparation of HEMs for OER catalysts. In this study, the FeCoNiMnCr catalyst is synthesized for the first time usi...

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Published inMetals (Basel ) Vol. 14; no. 4; p. 384
Main Authors Wang, Zhiyuan, Zhang, Chengxu, Zhang, Yue, Hu, Jue
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2024
Subjects
Alloys
Carbon
Catalysis
Catalysts
Cavitation
Chemical synthesis
Clean technology
Efficiency
Electrocatalysis
Electrocatalysts
Electrolysis
Energy consumption
Entropy
Fossil fuels
Green technology
high-entropy materials
Hydrogen
Hydrogen as fuel
in situ Raman
Intermetallic compounds
Microscopy
Nanoparticles
oxygen evolution reaction
Oxygen evolution reactions
Sintering
Temperature
ultrasonic hydrothermal-sintering method
Ultrasonic imaging
United States > US
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Summary:High-entropy materials (HEMs) play a significant role in the electrocatalytic oxygen evolution reaction (OER) due to their unique properties. However, there are still challenges in the preparation of HEMs for OER catalysts. In this study, the FeCoNiMnCr catalyst is synthesized for the first time using the ultrasonic hydrothermal-sintering technique and exhibits excellent performance for OER electrocatalysis. There is an optimal ultrasonic hydrothermal time and power for achieving the best OER performance. The results demonstrate that the performance of FeCoNiMnCr catalysts prepared through ultrasonic hydrothermal sintering (US-FeCoNiMnCr) is significantly improved compared with the traditional hydrothermal-sintering method. The US-FeCoNiMnCr catalyst exhibits an overpotential of 228 mV at the current density of 10 mA cm−2 and a Tafel slope as low as 45.39 mV dec−1 in an alkaline medium. Moreover, the US-FeCoNiMnCr catalyst demonstrates remarkable stability in electrocatalytic OER with a minimal potential increase observed even after 48 h. This work not only provides valuable insights into high-entropy material synthesis, but also presents a powerful electrocatalyst for water electrolysis.
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content type line 14
ISSN:2075-4701
2075-4701
DOI:10.3390/met14040384