Enhancing nanoparticle stability of Sr1.9Fe1.5Mo0.5O6–δ electrode in solid oxide fuel cells via praseodymium oxide infiltrated surface protection layer

IF 6.7 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2025-05-28 DOI:10.1016/j.fuel.2025.135813

Yujie Wu , Jiyoon Shin , Hao-Yang Li , Zhe Lv , Pei-Chen Su

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Abstract

Mitigating nanoparticle agglomeration on anode ceramic electrodes is critical for maintaining performance during the long-term operation of solid oxide fuel cells. We infiltrate praseodymium into A-site deficient Sr_1.9Fe_1.5Mo_0.5O_6–δ (SFM), where the surface exsolved Fe nanoparticles due to the non-stoichiometric composition are effectively stabilized to improve the SFM electrode stability. The infiltrated praseodymium reacts with exsolved surface Fe nanoparticles and forms praseodymium ferrite, while the excess Pr₆O₁₁ reduces to Pr_xO_y, creating a protective surface film to mitigate Fe nanoparticle degradation and improving the electrode performance stability. The infiltrated Pr also improves surface charge transfer, significantly reducing electrode polarization resistance. The infiltrated Pr surface protective layer offers a promising strategy for long-term electrode durability in solid oxide fuel cells.

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通过氧化镨渗透表面保护层提高Sr1.9Fe1.5Mo0.5O6 -δ电极在固体氧化物燃料电池中的纳米颗粒稳定性

在固体氧化物燃料电池的长期运行过程中，减少纳米颗粒在阳极陶瓷电极上的团聚是保持电池性能的关键。我们将镨渗透到缺乏a位的Sr1.9Fe1.5Mo0.5O6 -δ (SFM)中，由于其非化学计量组成，表面暴露的Fe纳米粒子被有效稳定，提高了SFM电极的稳定性。渗入的镨与表面的铁纳米颗粒反应形成镨铁氧体，而过量的Pr6O11还原为PrxOy，形成一层保护表面膜，以减轻铁纳米颗粒的降解，提高电极性能的稳定性。渗入的Pr还改善了表面电荷转移，显著降低了电极极化电阻。渗透Pr表面保护层为固体氧化物燃料电池的长期电极耐久性提供了一种很有前途的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.