Atomic Co-N4and Co nanoparticles confined in COF@ZIF-67 derived core-shell carbon frameworks: bifunctional non-precious metal catalysts toward the ORR and HER

Minghao Liu, Qing Xu, Qiyang Miao, Shuai Yang, Ping Wu, Guojuan Liu, Jun He, Chengbing Yu, Gaofeng Zeng

Research output: Journal PublicationArticlepeer-review

4 Citations (Scopus)

Abstract

Constructing heterostructures of covalent organic frameworks (COFs) and metal organic frameworks (MOFs) has gained great attention for various applications due to their well-defined skeletons, ordered porosity and designable functions. Herein, the core-shell structured carbon frameworks, which contain high density active sites of uniform Co nanoparticles and atomic Co-N4, were realized by direct pyrolysis of TP-BPY-COF@ZIF-67. The thin COF-shell not only prevented the collapse and aggregation of ZIF-67 but also promoted the formation of mesopores for mass transport, and enhanced the graphitization degree for conductivity. The resultant COF@ZIF800exhibited bifunctional catalytic performance for the ORR and HER, in which the half-wave potential for ORR was 0.85 V in 0.1 M KOH and the over-potential for HER was 0.16 V at 10 mA cm−2in 1 M KOH were achieved. This work sheds light on exploring COFs and MOFs in electrochemical energy storage and conversion systems.

Original languageEnglish
Pages (from-to)228-233
Number of pages6
JournalJournal of Materials Chemistry A
Volume10
Issue number1
DOIs
Publication statusPublished - 7 Jan 2022

ASJC Scopus subject areas

  • Chemistry (all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science (all)

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