双功能
合金
纳米纤维
介孔材料
材料科学
纳米颗粒
聚丙烯腈
化学工程
催化作用
纳米技术
聚合物
化学
复合材料
工程类
有机化学
作者
Congling Li,Mengchen Wu,Rui Li
标识
DOI:10.1016/j.apcatb.2018.11.039
摘要
Mesoporous Fe/Co-N-C nanofibers with embedding FeCo nanoparticles (denote as [email protected]) have been prepared from electrospun Fe/Co-N coordination compounds with bicomponent polymers consisting of polyvinylpyrrolidone (PVP) and polyacrylonitrile (PAN). The as-fabricated hybrid nanofibers exhibited one-dimensional mesoporous morphology, a large BET surface area and uniformly distributed active sites (e.g FeCo alloy, Fe/Co-N). It elucidated that the co-existence of FeCo alloy and Fe/Co-N active sites could promote the catalytic activity of ORR and OER simultaneously. Essentially, the unique one-dimensional of nanofiber with observable porous morphology has indispensable contribution to charge transportation and exposure of active sites to O2 adsorption when assembled into a rechargeable zinc-air battery. As a result, [email protected] exhibited a low discharge-charge voltage gap (e.g. 0.9 V, discharge-charge at 20 mA cm−2), higher power density (e.g. 115 mW cm−2, at 143 mA cm−2) and stability.
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