原位/工况穆斯堡尔谱视角下的铁基氧还原反应电催化剂
收稿日期: 2025-06-25
修回日期: 2025-07-24
录用日期: 2025-08-12
网络出版日期: 2025-08-12
Iron-Involved ORR Electrocatalysts under the Lens of In-Situ/Operando Mössbauer Spectroscopy
Received date: 2025-06-25
Revised date: 2025-07-24
Accepted date: 2025-08-12
Online published: 2025-08-12
开发经济高效的氧还原反应（ORR）催化剂是一项重大挑战，尤其是在寻找铂等贵金属替代材料的研究中。近年来的显著进展推动电化学研究者利用储量丰富的材料开发高效ORR催化剂，其中铁（Fe）基材料因其优异的ORR催化性能而备受关注。尽管学界已认识到Fe在提升ORR催化活性中的关键作用，但材料属性与催化性能之间的关联仍尚不明确。对于设计无贵金属ORR电催化剂而言，理解氧电催化过程中的动态变化至关重要。穆斯堡尔谱（Mössbauer spectroscopy）在解析催化体系中Fe物种的结构特征方面具有独特优势，能够助力识别活性位点、阐明催化机理。本文通过综述领域内的典型研究案例，阐明了原位/工况57Fe 穆斯堡尔谱在各类铁基 ORR 催化材料中的应用，重点揭示了ORR催化的多个核心方面（如活性位点识别、稳定性评估、反应机理理解）。此外，本文还探讨了穆斯堡尔谱技术在该研究领域中的应用机遇与挑战，旨在揭示这一关键研究方向的潜在突破点与改进方向。
Sumbal Farid , 王军虎 . 原位/工况穆斯堡尔谱视角下的铁基氧还原反应电催化剂[J]. 电化学, 2026 , 32(1) : 2506261 . DOI: 10.61558/2993-074X.3578
Exploring cost-effective and efficient catalysts for oxygen reduction reaction (ORR) poses a significant challenge, especially in the pursuit of alternatives to precious metals like platinum. Significant advancements have driven electrochemists to develop efficient ORR catalysts using abundant materials, particularly iron (Fe)-based, known for their exceptional performance in ORR. While the crucial function of Fe in boosting ORR catalytic activity is recognized, the connection between material attributes and catalytic performance remains enigmatic. Understanding the dynamic processes involved in oxygen electrocatalysis is paramount for designing precious-metals-free ORR electrocatalysts. Mössbauer spectroscopy stands out as a powerful technique for deciphering the structural characteristics of Fe species in catalysis, facilitating the identification of active sites and the clarification of catalytic mechanisms. By showcasing noteworthy case studies within this review, we demonstrate the application of in-situ/operando 57Fe Mössbauer spectroscopy across diverse Fe-involved materials in ORR catalysis. This sheds light on various aspects of ORR catalysis, such as identifying active sites, assessing stability, and understanding the reaction mechanism. Our inquiry drives towards the opportunities and hurdles associated with Mössbauer spectroscopy, unveiling potential breakthroughs and avenues for enhancement within this pivotal research realm.
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