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Rapid and energy-efficient microwave pyrolysis for high-yield production of highly-active bifunctional electrocatalysts for water splitting

Journal Article


Abstract


  • Functional materials with tuned nanostructure derived from metal-organic frameworks (MOF) hold great promise in energy storage/conversion and catalysis. Herein, we report a novel strategy to fabricate carbon fiber (CF)-supported cobalt nanocatalysts (Co-NC/CF) by a self-made "microreactor" consisted of randomly stacked graphene powder with the help of the microwave field. This newly-developed methodology can not only lead to a significantly enhanced yield of MOF-derived Co-NC up to 48.7 wt%, but also dramatically reduce the pyrolysis time (in just 60 s) and energy consumption (only 0.37% of traditional pyrolysis method). The experimental results combined with theoretical calculations revealed that the synthesized Co-NC/CF with optimized surface binding capability for reaction intermediates featured high-efficient catalytic activities for OER and HER owing to the electron transfer from cobalt to the surface carbon layers. The present microwave pyrolysis technique with an ultra-short synthesis cycle, high product yield and excellent energy efficiency, also demonstrated broad applicability for the synthesis of other MOF-derived functional materials.

UOW Authors


  •   Zhou, Si (external author)

Publication Date


  • 2020

Citation


  • Huang, H., Zhou, S., Yu, C., Huang, H., Zhao, J., Dai, L., & Qiu, J. (2020). Rapid and energy-efficient microwave pyrolysis for high-yield production of highly-active bifunctional electrocatalysts for water splitting. Energy and Environmental Science, 13(2), 545-553. doi:10.1039/c9ee03273h

Scopus Eid


  • 2-s2.0-85079844606

Start Page


  • 545

End Page


  • 553

Volume


  • 13

Issue


  • 2

Place Of Publication


Abstract


  • Functional materials with tuned nanostructure derived from metal-organic frameworks (MOF) hold great promise in energy storage/conversion and catalysis. Herein, we report a novel strategy to fabricate carbon fiber (CF)-supported cobalt nanocatalysts (Co-NC/CF) by a self-made "microreactor" consisted of randomly stacked graphene powder with the help of the microwave field. This newly-developed methodology can not only lead to a significantly enhanced yield of MOF-derived Co-NC up to 48.7 wt%, but also dramatically reduce the pyrolysis time (in just 60 s) and energy consumption (only 0.37% of traditional pyrolysis method). The experimental results combined with theoretical calculations revealed that the synthesized Co-NC/CF with optimized surface binding capability for reaction intermediates featured high-efficient catalytic activities for OER and HER owing to the electron transfer from cobalt to the surface carbon layers. The present microwave pyrolysis technique with an ultra-short synthesis cycle, high product yield and excellent energy efficiency, also demonstrated broad applicability for the synthesis of other MOF-derived functional materials.

UOW Authors


  •   Zhou, Si (external author)

Publication Date


  • 2020

Citation


  • Huang, H., Zhou, S., Yu, C., Huang, H., Zhao, J., Dai, L., & Qiu, J. (2020). Rapid and energy-efficient microwave pyrolysis for high-yield production of highly-active bifunctional electrocatalysts for water splitting. Energy and Environmental Science, 13(2), 545-553. doi:10.1039/c9ee03273h

Scopus Eid


  • 2-s2.0-85079844606

Start Page


  • 545

End Page


  • 553

Volume


  • 13

Issue


  • 2

Place Of Publication