Journal
NANOSCALE
Volume 8, Issue 8, Pages 4681-4687Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr07929b
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Funding
- National Natural Science Foundation of China [21306060, 21573083]
- Program for New Century Excellent Talents in Universities of China [NCET 130237]
- Fundamental Research Funds for the Central University [2013TS136, 2014YQ009]
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0012704]
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Investigating active, stable, and low-cost materials for the oxygen reduction reaction is one of the key challenges in fuel-cell research. In this work, we describe the formation of N-doped carbon shell coated Co@CoO nanoparticles supported on Vulcan XC-72 carbon materials (Co@CoO@N-C/C) based on a simple supramolecular gel-assisted method. The double-shelled Co@CoO@N-C/C core-shell nanoparticles exhibit superior electrocatalytic activities for the oxygen reduction reaction compared to N-doped carbon and cobalt oxides, demonstrating the synergistic effect of the hybrid nanomaterials. Notably, the Co@CoO@N-C/C nanoparticles give rise to a comparable four-electron selectivity, long-term stability, and high methanol tolerance; all show a multi-fold improvement over the commercial Pt/C catalyst. The progress is of great importance in exploring advanced non-precious metal-based electrocatalysts for fuel cell applications.
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