Fe-Cu电子协同与结构调控的碳基催化剂及其锌-空气电池性能研究OA
Research on Carbon-Based Catalysts with Fe-Cu Electronic Synergy and Structural Regulation for Zinc-Air Battery Performance
文本以 ZIF-L 为前驱体,采用共沉淀与一步高温热解的方法,制备具有三维导电网络和 Fe-Cu 双金属协同效应的 FeCux-CNTs 碳基材料.通过调控 Cu 的掺杂比例,实现了对催化剂微观形貌与电子结构的调控.物相和结构表征结果表明,Fe、Cu 掺杂可以在材料中原位生成大量碳纳米管,并与 ZIF-L 衍生的二维碳基体相互交织,共同构成三维导电网络结构.适量 Cu 的引入提高了材料中吡啶氮的含量,并诱导电子从 Cu 位点向 Fe 位点迁移,有效调节 Fe 活性中心的电子结构,增强氧还原反应的催化能力.FeCu0.030-CNTs 在碱性电解液中的氧还原半波电位达到0.892 V,优于商用 Pt/C 的0.834 V.将 FeCu0.030-CNTs 作为空气阴极组装成的锌-空气电池,其功率密度、比容量和循环稳定性均显著优于 Pt/C 的对比电池.
A carbon-based FeCux-CNTs material,synthesized via co-precipitation and one-step pyrolysis of a ZIF-L precursor,exhibits a three-dimensional conductive network and Fe-Cu synergy.Modulating the copper doping ratio controlled both the catalyst's morphology and electronic structure.Characterization confirmed that Fe and Cu doping promoted the in-situ growth of abundant carbon nanotubes.These nanotubes interwove with the two-dimensional car-bon matrix derived from ZIF-L,forming an integrated three-dimensional network.Optimal Cu incorporation elevated the pyridinic nitrogen content and induced electron transfer from Cu to Fe sites.This effectively tailored the elec-tronic structure of the Fe active centers,boosting their oxygen reduction reaction(ORR)activity.In alkaline electro-lyte,the FeCu0.030-CNTs catalyst achieved a half-wave potential of 0.892 V,surpassing that of commercial Pt/C(0.834 V).Zinc-air batteries fabricated with this material as the air cathode demonstrated markedly higher power density,specific capacity,and cycling stability than those using a Pt/C cathode.
陶一航;李洋
安徽理工大学力学与光电物理学院,安徽 淮南,232001安徽理工大学力学与光电物理学院,安徽 淮南,232001
信息技术与安全科学
氧还原反应ZIF-L三维导电网络电子结构调控锌-空气电池
oxygen reduction reactionZIF-Lthree-dimensional conductive networkelectronic structure modula-tionzinc-air battery
《宿州学院学报》 2026 (3)
1-7,7
安徽高校自然科学研究重点项目(KJ2020A0328).
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