Journal
CHEMICAL ENGINEERING JOURNAL
Volume 396, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125154
Keywords
Nanoporous carbons; Graphitic carbon; Heterostructure; Covalent organic frameworks; Oxygen reduction reaction
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Funding
- China Scholarship Council [201908130047]
- Australian Research Council (ARC) [FT150100479, LP180100429]
- Global Connections Fund (Bridging Grant Scheme) of the Australian Academy of Technology and Engineering (ATSE)
- King Saud University, Riyadh, Saudi Arabia [RSP-2019/6]
- Nanjing University of Aeronautics and Astronautics
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The design and construction of superior electrocatalysts based on covalent organic frameworks (COFs) for oxygen reduction reaction (ORR) have attracted increasing interest. However, COFs typically exhibit low electrocatalytic activity as a result of their poor electrical conductivity. In this study, a highly graphitic nitrogen-doped porous carbon electrocatalyst (GC@COF-NC) is fabricated by utilizing metal-organic framework (MOF)-derived GC@COF core-shell heterostructure as a sacrificial template. Featured with high conductivity, hierarchical porosity (micropores and mesopores), and abundant N doping, the resulting GC@COF-NC heterostructure manifests a high activity for ORR in an alkaline solution with exceptional onset and half-wave potentials, direct four-electron pathway, and good long-term stability. This synthetic strategy is expected to open a new avenue toward the construction of other COF-derived heteroatom-doped graphitic carbon heterostructures with promising potential for electrocatalytic applications.
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