Methanol steam mediated corrosion engineering towards high-entropy NiFe layered double hydroxide for ultra-stable oxygen evolution

Jinqiang Gao, Haifeng Yuan, Xinjuan Du, Feng Dong, Yu Zhou, Shengnan Na, Yanpeng Chen, Mingyu Hu, Mei Hong*, Shihe Yang

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

Abstract

Rational design of viable routes to obtain efficient and stable oxygen evolution reaction (OER) electrocatalysts remains challenging, especially under industrial conditions. Here, we provide a solvent-steam assisted corrosion engineering strategy to directly fabricate high-entropy NiFe-LDH with spatially resolved structural order. Ammonium fluoride in methanol steam enables the formation of nanosheets while Fe3+ effectively enhances their adhesion to the semi-sacrificial nickel-iron foam (NFF), thereby conjuring up a NiFe-LDH@NFF catalyst that exhibits remarkable adaptability to robust electrochemical activation yet with excellent stability. Comprehensive measurements reveal the in-situ formation of high-valance metal oxyhydroxide and the enhancement of adsorption-desorption process. Under the industrial condition (6 mol/L KOH, 60 °C), the NiFe-LDH@NFF exhibits excellent activity of 50 mA/cm2 at 1.55 V and high durability of over 120 h at 200 mA/cm2. We anticipate that the steam assisted strategy could promote the development of efficient non-precious electrocatalysts for hydrogen energy.

Original languageEnglish
Article number110232
Number of pages6
JournalChinese Chemical Letters
Volume36
Issue number1
DOIs
Publication statusPublished - Jan 2025

Scopus Subject Areas

  • General Chemistry

User-Defined Keywords

  • Corrosion engineering
  • High-entropy material
  • NiFe-LDH
  • Oxygen evolution reaction
  • Stability

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