Journal
NANO RESEARCH
Volume 15, Issue 3, Pages 1926-1933Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-021-3816-y
Keywords
mechanochemical approach; scalable synthesis; atomically dispersed Fe sites; oxygen reduction reaction; fuel cells
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Funding
- National Key Research and Development Program of China [2017YFA0206500]
- Key Program of National Natural Science Foundation of China [51732002]
- National Natural Science Foundation of China [21971002]
- Fundamental Research Funds for the Central Universities [buctrc202118, buctrc202007]
- Distinguished Scientist Program at BUCT, Beijing Advanced Innovation Center for Soft Matter Science and Engineering [buctylkxj02]
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This study presents a simple and environmentally friendly mechanochemical method to synthesize zeolitic imidazolate frameworks precursors for the production of atomically dispersed Fe-N-4 sites on a large scale. The resulting thin porous carbon nanosheets with abundant active sites exhibit superior catalytic activity towards oxygen reduction reaction, providing a promising approach for cost-effective production of atomically dispersed transition metal catalysts at a large scale for practical applications.
Atomically dispersed metals stabilized by nitrogen elements in carbon skeleton hold great promise as alternatives for Pt-based catalysts towards oxygen reduction reaction in proton exchange membrane fuel cells. However, their widespread commercial applications are limited by complicated synthetic procedures for mass production. Herein, we are proposing a simple, green mechanochemical approach to synthesize zeolitic imidazolate frameworks precursors for the production of atomically dispersed Fe-N-4 sites in holey carbon nanosheets on a large scale. The thin porous carbon nanosheets (PCNs) with atomically dispersed Fe-N-4 moieties can be prepared in hectogram scale by directly pyrolysis of salt-sealed Fe-based zeolitic imidazolate framework-8 (Fe-ZIF-8@NaCl) precursors. The PCNs possess large specific surface area, abundant lamellar edges and rich Fe-N-4 active sites, and show superior catalytic activity towards oxygen reduction reaction in an acid electrolyte. This work provides a promising approach to cost-effective production of atomically dispersed transition metal catalysts on large scale for practical applications.
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