Synergistic coupling of Mo2N and Fe single atoms in hollow carbon enables robust bifunctional catalysis in zinc–air battery applications

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-06-15 DOI:10.1016/j.cej.2025.164872

Quoc Hao Nguyen, Saleem Sidra, Sion Oh, Kyungmin Im, Huyen Thi Dao, Do Hwan Kim, Lawrence Yoon Suk Lee, Jinsoo Kim

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引用次数: 0

Abstract

Single-atom (SA) catalysts based on Fe-group elements are highly effective for the oxygen reduction reaction (ORR) in rechargeable zinc–air batteries (ZABs), yet their oxygen evolution reaction (OER) performance remains a critical bottleneck for practical applications. Here, we report a bifunctional electrocatalyst comprising ultrafine Mo₂N nanoparticles encapsulated within Fe SA-anchored N-doped hollow carbon heterostructures (Mo₂N@Fe–N–HC). The synergistic interaction between Mo₂N and densely distributed Fe SAs, combined with a hierarchical porous architecture, enhances reaction kinetics, optimizes ORR/OER intermediate adsorption energies, and improves mass transport. Mo₂N@Fe–N–HC outperforms commercial Pt/C and RuO₂ benchmarks, exhibiting exceptional bifunctional activity. ZABs incorporating Mo₂N@Fe–N–HC demonstrate high discharge power density and remarkable durability, with aqueous ZAB operating stably for over 650 h and solid-state ZAB for 130 h at −15 °C. This work offers a robust strategy for designing advanced electrocatalysts, advancing the efficiency and longevity of ZABs for practical energy storage solutions.

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空心碳中Mo2N和Fe单原子的协同耦合使锌空气电池应用具有强大的双功能催化作用

基于铁基元素的单原子（SA）催化剂在可充电锌-空气电池（ZABs）的氧还原反应（ORR）中表现优异，但其析氧反应（OER）性能仍是制约其实际应用的关键瓶颈。在这里，我们报道了一种双功能电催化剂，该电催化剂由超细Mo2N纳米颗粒包裹在Fe sa锚定的n掺杂空心碳异质结构中（Mo2N@Fe -N-HC）。Mo2N与密集分布的Fe - sa之间的协同作用，结合层叠多孔结构，增强了反应动力学，优化了ORR/OER中间吸附能，改善了质量传递。Mo2N@Fe -N-HC优于商业Pt/C和RuO2基准，表现出卓越的双功能活性。含有Mo2N@Fe -N-HC的ZAB具有高放电功率密度和卓越的耐久性，在- 15 °C下，水性ZAB稳定运行超过650 h，固态ZAB稳定运行130 h。这项工作为设计先进的电催化剂提供了一个强大的策略，提高了ZABs在实际储能解决方案中的效率和寿命。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.