<br>用于 ORR、OER 和 HER 的三功能铁基电催化剂，具有坚固的三维框架结构,Journal of Materials Chemistry A

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用于 ORR、OER 和 HER 的三功能铁基电催化剂，具有坚固的三维框架结构
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2024-07-05 , DOI: 10.1039/d4ta01958j
Haixia Liang ₁ , Jian Li ₂ , Jinli Zhang _{1,

3} , Wencai Peng ₁ , Jun Li ₄ , Jichang Liu ₅

Affiliation

氧还原反应（ORR）、析氧反应（OER）和析氢反应（HER）电催化在可充电锌空气电池（ZAB）和水分解中发挥着重要作用，多年来受到广泛关注。因此，设计和开发高效、经济的多功能电催化剂被认为是当前绿色和可再生能源领域的重要课题。在本文中，设计了一种简单且可重复的 SiO ₂ 模板策略，利用天然氯化血红素作为 Fe-N-C 材料的来源。氯化血红素通过静电相互作用吸附在 SiO ₂ 表面，使得氯化血红素在高温热解过程中沿着 SiO ₂ 球体表面拉伸。最终产品命名为 Fe ₃ C–Fe/NC-800，具有丰富的空腔和坚固的 3D 框架结构，显示出优异的 ORR、OER 和 HER 活性。理论计算表明，Fe ₃ C 和 FeN ₄ 位点之间的协同相互作用降低了电化学反应过程中的能垒，提高了 ORR、OER 和 HER 性能。基于其优异的三官能活性，Fe ₃ C–Fe/NC-800 在 ZAB 和整体水分解装置中具有潜在的应用前景。这项工作将为清洁能源转换装置中使用的电催化剂的设计和制备提供见解。

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Tri-functional Fe-based electrocatalyst with sturdy three-dimensional frame construction for the ORR, OER and HER

Oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) electrocatalysis have an important role in rechargeable zinc–air batteries (ZABs) and water splitting and have received extensive attention over the years. Therefore, the design and development of efficient and economical multifunctional electrocatalysts is currently considered an important subject in the field of green and renewable energy. In this paper, a simple and reproducible SiO₂ templating strategy is designed to utilize natural hemin as a source of Fe–N–C material. Hemin is adsorbed onto the surface of SiO₂ through electrostatic interaction, which allows hemin to stretch along the surface of SiO₂ spheres during high-temperature pyrolysis. The final product named Fe₃C–Fe/NC-800 with abundant cavities and a sturdy 3D framework structure shows excellent ORR, OER and HER activities. Theoretical calculations show that the synergistic interaction between Fe₃C and FeN₄ sites reduces the energy barrier during the electrochemical reaction and improves the ORR, OER, and HER performance. Based on its superior tri-functional activity, Fe₃C–Fe/NC-800 finds potential applications in ZABs and overall water-splitting devices. This work will provide insights into the design and preparation of electrocatalysts used in clean energy conversion devices.

更新日期：2024-07-05

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