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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Electrospun MOF-Based FeCo Nanoparticles Embedded in Nitrogen-Doped Mesoporous Carbon Nanofibers as an Efficient Bifunctional Catalyst for Oxygen Reduction and Oxygen Evolution Reactions in Zinc-Air Batteries
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Electrospun MOF-Based FeCo Nanoparticles Embedded in Nitrogen-Doped Mesoporous Carbon Nanofibers as an Efficient Bifunctional Catalyst for Oxygen Reduction and Oxygen Evolution Reactions in Zinc-Air Batteries

机译：基于ElectOp的Mof基FECO纳米颗粒嵌入氮掺杂的介孔碳纳米纤维中，作为锌 - 空气电池中的氧气还原和氧气进化反应的有效双官能催化剂

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Low-price, high-performance and strong-stability electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are highly significant in the application of clean energy devices like rechargeable zinc-air batteries and renewable fuel cells. In this paper, a Prussian blue analogue Co-3[Fe(CN)(6)](2).nH(2)O (Co-Fe PBA), as a well-known member of the metal-organic framework family, was electrospun into polyacrylonitrile (PAN) nanofibers to obtain composite Co-Fe PBA@PAN nanofibers. Nitrogen-doped carbon nanofibers encapsulated FeCo alloy nanoparticles (FeCo-NCNFs-Ts, T = 700, 800, 900 degrees C) were synthesized by pyrolysizing Co-Fe PBA@PAN precursor at different temperatures under an argon atmosphere. The effects of different calcination temperatures and mass ratios between Co-Fe PBA and PAN on ORR/OER catalytic activity were explored. Among FeCo-NCNFs-Ts, FeCo-NCNFs-800 had the highest bifunctional electrocatalytic performance with a lower reversible overvoltage of 0.869 V between ORR (E-1/2) and OER (E-j = 10 mA cm(-2)), excellent stability and methanol durability, which even exceeded those of Pt/C and RuO2. The superb bifunctional activity for FeCo-NCNFs-800 was comparable to that of non noble electrocatalysts reported in recent literatures. Moreover, the zinc-air battery based on the FeCo-NCNFs-800 air-cathode catalyst had a high power density of 74 mW cm(-2) and strong cycling stability (125 cycles for 42 h), which can be comparable to a Pt/C-RuO2 zinc-air battery. The impressive bifunctional activity on ORR and OER for the FeCo-NCNFs-800 catalyst in the zinc-air battery can be attributed to the synergistic effects of the one-dimensional fibrous structure, FeCo alloy nanoparticles, Co-N (pyridinic-N) active sites, and numerous mesopores.
机译：低价，高性能和强稳定性电催化剂用于氧还原反应（ORR）和氧气进化反应（OER）在适用于可充电锌 - 空气电池和可再生燃料电池等清洁能量装置中非常重要。本文中，普鲁士蓝色模拟CO-3 [Fe（CN）（6）]（2）。NH（2）O（CO-FE PBA），作为金属有机框架家族的公知成员，将电纺成聚丙烯腈（锅）纳米纤维，得到复合CO-FE PBA泛纳米纤维。通过在氩气氛下的不同温度下将Co-Fe PBA @ PAN前体聚集在氩气氛下的不同温度下，合成氮掺杂的碳纳米纤维（FECO-NCNFS-TS，T = 700,800,900c）。探讨了CO-Fe PBA与锅与OR / OER催化活性的不同煅烧温度和质量比的影响。在FECO-NCNFS-TS中，FECO-NCNFS-800具有最高的双功能电催化性能，在ORR（E-1/2）和OER之间的较低可逆过电压为0.869 V（EJ = 10 mA CM（-2）），优异稳定性和甲醇耐久性，甚至超过了Pt / c和Ruo2的耐药性。 FECO-NCNFS-800的SuperB双功能活性与最近文献中报道的非贵宾电催化剂相当。此外，基于FECO-NCNFS-800气阴极催化剂的锌 - 空气电池具有74mW厘米（-2）的高功率密度，并且强的循环稳定性（125个循环42小时），可以与a相当Pt / C-Ruo2锌空气电池。锌 - 空气电池中FECO-NCNFS-800催化剂的令人印象深刻的双功能活性可以归因于一维纤维结构，FECO合金纳米粒子，CO-N（吡啶-N）活性的协同效应网站和众多梅斯奥龄。

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