储能科学与技术 ›› 2025, Vol. 14 ›› Issue (10): 4020-4026.doi: 10.19799/j.cnki.2095-4239.2025.0292

• 储能测试与评价 • 上一篇    下一篇

火焰法原位改性不锈钢电极及其电催化析氧反应的研究

白智群(), 沙微浩, 苗津源, 谢鳌, 林峻如, 万平玉, 唐阳()   

  1. 北京化工大学化学学院,北京 100029
  • 收稿日期:2025-03-27 修回日期:2025-04-10 出版日期:2025-10-28 发布日期:2025-10-20
  • 通讯作者: 唐阳 E-mail:baizq@mail.buct.edu.cn;120616135@qq.com
  • 作者简介:白智群(1990—),男,博士研究生,研究方向为电解水制氢阳极催化剂,E-mail:baizq@mail.buct.edu.cn
  • 基金资助:
    中央高校基本科研业务费(BH202436)

Flame-enabled in situ engineering of stainless-steel electrodes for high-efficiency electrocatalytic oxygen evolution

Zhiqun BAI(), Weihao SHA, Jinyuan MIAO, Ao XIE, Junru LIN, Pingyu WAN, Yang TANG()   

  1. College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2025-03-27 Revised:2025-04-10 Online:2025-10-28 Published:2025-10-20
  • Contact: Yang TANG E-mail:baizq@mail.buct.edu.cn;120616135@qq.com

摘要:

本研究发展了一种基于火焰燃烧的“一步成型”原位改性策略,在316L不锈钢表面原位构筑多孔NiFe复合氧化物催化层(NiFe/316L),实现了析氧反应(OER)催化剂活性与工业稳定性的协同优化。通过高温火焰氧化耦合及快速冷淬,实现合金相分离与分级造孔,形成具有连续多孔结构的多孔界面;X射线光电子能谱(XPS)证实电极表面Ni,Fe,O元素共存,并均匀地分布在电极表面。在1 mol/L KOH中,电极表现出优异OER活性,10 mA/cm2下过电位为256 mV,Tafel斜率为40.8 mV/dec,电化学活性面积为141 cm2,较基底提升7倍,电荷转移电阻(Rct)从基底的202.9 Ω降至3.36 Ω。在模拟工业条件(30% KOH,80 ℃)下,1000 mA/cm2电流密度持续运行100小时后,电极性能未有明显衰减,稳定性优于多数报道的非贵金属催化剂。本研究为工业级OER电极开发提供了高效、低成本的解决方案。

关键词: 析氧反应, 316L不锈钢, 火焰燃烧法, 电解水

Abstract:

This study presents a flame-combustion-driven one-step in situ modification strategy to construct a porous NiFe composite oxide catalytic layer (NiFe/316L) on 316L stainless steel, achieving synergistic optimization of oxygen evolution reaction (OER) activity and industrial-grade stability. A hierarchical porous structure with interconnected channels was fabricated through high-temperature flame oxidation coupled with rapid quenching, inducing alloy phase separation and multiscale pore formation. X-ray photoelectron spectroscopy confirmed the coexistence and uniform distribution of Ni, Fe, and O species across the electrode surface. In 1 mol/L KOH electrolyte, the optimized electrode exhibited excellent OER performance with a low overpotential of 256 mV at 10 mA/cm2, a Tafel slope of 40.8 mV/dec, and a sevenfold increase in electrochemically active surface area (141 cm2) relative to the bare substrate. The charge transfer resistance decreased markedly from 202.9 Ω to 3.36 Ω. Under industrially relevant conditions (30% KOH, 80 ℃), the electrode demonstrated outstanding durability with negligible performance decay after 100 h of continuous operation at 1000 mA/cm2, surpassing most reported non-precious metal catalysts. This work offers a cost-effective and scalable approach for fabricating industrially viable OER electrodes

Key words: oxygen evolution reaction, 316L stainless steel, flame spray pyrolysis, electrolysis water

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