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Coupled nanocomposite Co5.47N-Co3Fe7 inlaid in tremella-like carbon framework as highly efficient multifunctional electrocatalyst for oxygen transformation and overall water splitting

Abstract

Electrocatalysts with high activity, low cost and long-term durability for the oxygen transformation and water splitting are highly demanded for realizing large-scale commercial application of the renewable energy technologies, such as metal-air batteries and water splitting cells, but remain as a great challenge. Herein, the graphene/nanotube-constructed tremella-like carbon framework with 3D open aisles embedding the coupled Co5.47N and Co3Fe7 nanoparticles (Co5.47N@Co3Fe7/N-Cs) were created by hydrothermal-pyrolysis strategy. The mutual entanglement and connection of the nanosheets and nanotubes builds the carbon network with hierarchically porous structure and multifarious active centers such as Fe-Co, Co(Fe)-Nx moieties and nitrogen-doped carbon (N-C) co-existed on the surface of the prepared Co5.47N@Co3Fe7/N-Cs, which exhibits excellent trifunctional electrocatalytic performance for the ORR, OER and HER. The primary zinc-air battery assembled with Co5.47N@Co3Fe7/N-C-900 gain an advantage over the Pt/C-based counterparts. Besides, the performance of overall water splitting device using Co5.47N@Co3Fe7/N-C-900 as electrode materials is comparable to that of Pt/C-IrO2 pair-assembled cell. To the best of our knowledge, this is the top-notch trifunctional electrocatalysts for ORR, HER and OER so far. This work provides an effective strategy to prepare high-performance trifunctional electrocatalysts with the excellent catalytic performance and wide application prospect in the sustainable energy conversion techniques.

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Publication details

The article was received on 15 Aug 2019, accepted on 01 Oct 2019 and first published on 05 Oct 2019


Article type: Paper
DOI: 10.1039/C9SE00657E
Sustainable Energy Fuels, 2019, Accepted Manuscript

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    Coupled nanocomposite Co5.47N-Co3Fe7 inlaid in tremella-like carbon framework as highly efficient multifunctional electrocatalyst for oxygen transformation and overall water splitting

    F. Kong, C. Zhang, Y. Qiao, R. Li, A. Kong and Y. Shan, Sustainable Energy Fuels, 2019, Accepted Manuscript , DOI: 10.1039/C9SE00657E

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