Pearl Necklace Fibrous Carbon Sharing Fe–N/Fe–P Dual Active Sites as Efficient Oxygen Reduction Catalyst in Broad Media and for Liquid/Solid‐State Rechargeable Zn–Air Battery,Energy Technology

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Pearl Necklace Fibrous Carbon Sharing Fe–N/Fe–P Dual Active Sites as Efficient Oxygen Reduction Catalyst in Broad Media and for Liquid/Solid‐State Rechargeable Zn–Air Battery
Energy Technology ( IF 3.6 ) Pub Date : 2020-01-09 , DOI: 10.1002/ente.201901263
Mengchen Wu ₁ , Rui Liu ₁

Affiliation

Optimized catalysts are attractive from the standpoint of energy storage and conversion. Herein, a pearl necklace fibrous carbon catalyst with Fe–N/Fe–P dual active sites (Fe–P/NHCF) is fabricated via carbonization–phosphidation of metal–organic framework (MOF)/polyacrylonitrile nanofibers. Benefiting from Fe–N/Fe–P doping‐induced active sites, accompanied by particular hierarchical porous merit and a 1D necklace network to facilitate the oxygen reduction reaction (ORR), it exhibits a half‐wave potential of 0.82 V in alkaline medium and outperforms commercial Pt/C in terms of stability in acid medium. Furthermore, a low voltage gap (1.04 V) is acquired in a liquid Zn–air battery with Fe–P/NHCF as the cathode. Meanwhile, the portable solid‐state Zn–air battery displays an open circuit voltage of 1.32 V and a power density of 42 mW cm⁻². This strategy puts forward a protocol to develop tailored geometry with dual active sites for ORR in alkaline/acid media, which is expected to promote devices of practical significance.

中文翻译：

珍珠项链纤维状碳共享Fe–N / Fe–P双重活性位点，作为宽介质和液态/固态可充电锌空气电池中的高效氧还原催化剂

从能量存储和转化的角度来看，优化的催化剂具有吸引力。本文中，通过金属-有机骨架（MOF）/聚丙烯腈纳米纤维的碳化-磷化制备了具有Fe-N / Fe-P双活性位（Fe-P / NHCF）的珍珠项链纤维碳催化剂。受益于Fe-N / Fe-P掺杂诱导的活性位点，并伴随着特殊的分级多孔性能和促进氧还原反应（ORR）的1D项链网络，它在碱性介质中的半波电势为0.82V。就在酸性介质中的稳定性而言，其性能优于商业Pt / C。此外，在以Fe-P / NHCF为阴极的液态Zn-空气电池中，获得的低压差（1.04 V）。同时，便携式固态Zn-空气电池显示1.32 V的开路电压和42 mW cm的功率密度⁻²。该策略提出了开发针对碱性/酸性介质中具有ORR双重活性位点的量身定制几何结构的方案，有望促进具有实际意义的装置。

更新日期：2020-01-09

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