Tunable distribution of Fe nanoparticles Exsolution via acid etching on double perovskite oxide anode for solid oxide fuel cells

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-10-04 DOI:10.1016/j.matlet.2025.139609

Yueyue Sun , Jiaming Yang , Zhengrong Liu , Chaofan Yin , Zixuan Xue , Zilin Zhou , Qiankai Zhang , Jiajia Cui , Jun Zhou , Kai Wu

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引用次数: 0

Abstract

Solid oxide fuel cells (SOFCs) are a promising energy conversion technology with high efficiency and environmental compatibility. Applied as anode materials, perovskite oxides govern the electrochemical performance, with an exsolution strategy for enhancing catalytic activity. In this work, Sr₂Fe_1.5Mo_0.5O_6-δ exhibits an A-site deficient surface enriched with Sr and O vacancies via the acid etching method, thereby exposing B-site cations and facilitating the nucleation process during exsolution. The optimized Fe nanoparticles distribution enhances the H₂ adsorption and H₂O desorption, resulting in a 25 % increase of the peak power density to 1.04 W cm⁻² from 0.83 W cm⁻² at 800 °C. The ingenious design of surface reconstruction demonstrates significant potential in advancing perovskite-based electrocatalysts for SOFCs.

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固体氧化物燃料电池双钙钛矿阳极上铁纳米颗粒的酸蚀可调外溶分布

固体氧化物燃料电池（SOFCs）是一种具有高效、环保等优点的能源转换技术。作为阳极材料，钙钛矿氧化物控制着电化学性能，并通过溶出策略提高催化活性。在本研究中，通过酸蚀法，Sr2Fe1.5Mo0.5O6-δ呈现出富含Sr和O空位的a位缺陷表面，从而暴露出b位阳离子，促进了析出过程中的成核过程。优化后的Fe纳米颗粒分布增强了H2的吸附和H2O的解吸，使800℃下的峰值功率密度从0.83 W cm−2提高到1.04 W cm−2，提高了25%。表面重建的巧妙设计在推进钙钛矿基sofc电催化剂方面显示出巨大的潜力。

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

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive