Journal
ACS NANO
Volume 11, Issue 8, Pages 8379-8386Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b03807
Keywords
2D covalent organic polymers; metal-organic frameworks; nanoconfinement; oxygen reduction reaction; electrocatalysis
Categories
Funding
- NSF of China [51502012, 21676020, 21620102007]
- Beijing Natural Science Foundation [2162032]
- Start-up fund for talent introduction of Beijing University of Chemical Technology
- Talent cultivation of State Key Laboratory of Organic-Inorganic Composites
- Fundamental Research Funds for the Central Universities [buctrc201714, ZD1502]
- 111 project of China [B14004]
- Distinguished scientist program at BUCT
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The output energy capacity of green electrochemical devices, e.g., fuel cells, depends strongly on the sluggish oxygen reduction reaction (ORR), which requires catalysts. One of the desired features for highly efficient ORR electrocatalytic materials is the richness of welldefined activate sites. Herein, we developed a facile approach to prepare highly efficient nonprecious metal and nitrogen-doped carbon-based ORR catalysts based on covalent organic polymers (COPs) synthesized in situ, in the nanoconfined space of highly ordered metal organic frameworks (MOFs). The MOF templet ensured the developed electrocatalysts possess a high surface area with homogeneously distributed small metal/nitrogen active sites, as confirmed by X-ray absorption fine structure measurements and first-principles calculations, leading to highly efficient ORR electrocatalytic activity. Notably, the developed COP-TPP(Fe)@MOF-900 exhibits a 16 mV positive half wave potential compared with the benchmarked Pt/C.
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