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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Atomic Fe hetero-layered coordination between g-C3N4 and graphene nanomeshes enhances the ORR electrocatalytic performance of zinc-air batteries
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Atomic Fe hetero-layered coordination between g-C3N4 and graphene nanomeshes enhances the ORR electrocatalytic performance of zinc-air batteries

机译：G-C3N4和石墨烯NaNOMESHES之间的原子杂杂层配位增强了锌 - 空气电池的ORR电催化性能

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摘要

Hetero-layered iron-nitrogen coordination between g-C3N4 and graphene nanomeshes was developed for superior electrocatalytic activity in the oxygen reduction reaction. Compared with the performance of g-C3N4 or atomic Fe embedded in g-C3N4 in the oxygen reduction reaction, the current density at -0.5 V of the two-dimensional hetero-hybrid of atomic Fe, g-C3N4 and graphene was enhanced 13 times, and the half-wave potential of the hybrid positively shifted to 0.278 V. The hybrid exhibited superior electrocatalytic activity with a 20 mV more positive half-wave potential, higher current density, better methanol tolerance and longer-term stability compared to commercial Pt-C. This enhancement originated from mesh-on-mesh exposed inter-layer bridged Fe-N-4.1 coordination active sites between g-C3N4 and graphene, which favored a four-electron pathway accompanied by the improvement of the conductivity and mass transport. Superior performance, including a low charge-discharge voltage gap over 20 h of cyling, of the hybrid-based Zn-air battery was achieved. This strategy of the hetero-layered interfacial metal-nitrogen coordination between different 2D materials is a general approach to develop advanced electrocatalysts for sustainable energy applications.
机译：在氧还原反应中开发了G-C3N4和石墨烯纳米网之间的杂层铁氮配位，用于优异的电催化活性。与在氧还原反应中嵌入G-C3N4中的G-C3N4或原子Fe的性能相比，原子Fe，G-C3N4和石墨烯的二维杂杂化物的电流密度提高了13倍，杂交的半波电位正偏移到0.278V。杂交物与商业pt-相比，杂种具有20mV的较高的电催化活性，较高的正半波电位，更高的电流密度，更好的甲醇耐受性和长期稳定性。 C。这种增强源于网上的桥接层间桥接层间桥接性Fe-N-4.1在G-C3N4和石墨烯之间的配位活性位点，其优选于伴随着导电性和质量传输的改善的四电子途径。实现了杂交基Zn-Air电池的高电荷放电电压差距，包括气缸超过20小时的优异性能。不同2D材料之间的杂层界面金属 - 氮配位的这种策略是一种用于开发用于可持续能源应用的先进电催化剂的一般方法。

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    Wang Congwei; Zhao Huifang; Wang Jie; Zhao Zheng; Cheng Miao; Duan Xiaoyong; Zhang Qin; Wang Junying; Wang Junzhong;

  • 作者单位

    Chinese Acad Sci Inst Coal Chem CAS Key Lab Carbon Mat Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem CAS Key Lab Carbon Mat Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem CAS Key Lab Carbon Mat Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem CAS Key Lab Carbon Mat Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem CAS Key Lab Carbon Mat Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem CAS Key Lab Carbon Mat Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem CAS Key Lab Carbon Mat Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem CAS Key Lab Carbon Mat Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem CAS Key Lab Carbon Mat Taiyuan 030001 Shanxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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