Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 20, Pages 7188-7196Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00802b
Keywords
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Funding
- National Science Foundation of China (NSFC) [51372271, 51172275, 51172007, 11004229]
- National Key Basic Research Program of China [2012CB215402]
- Institute of Physics (IOP)
- National Natural Science Fund of China [51272050]
- Program for New Century Excellent Talents in University [NECT-10-0049]
- UNIST (Ulsan National Institute of Science and Technology) [1,130064,01]
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A facile hydrothermal route has been developed to prepare graphene-Co3O4 nanocomposites. The graphene-Co3O4 nanocomposite catalyst demonstrates an excellent catalytic activity toward oxygen-reduction reaction including a considerably more positive half-wave potential (-0.23 V) than that of pristine graphene (-0.39 V), as well as higher cathodic currents. More importantly, this catalyst shows better long-term durability than the commercial Pt/C catalyst in an alkaline solution. The preliminary results indicate that the graphene-Co3O4 nanocomposite is an efficient and stable bifunctional catalyst for Li-air batteries and may be an alternative to the high-cost commercial Pt/C catalyst for the ORR/OER in alkaline solutions.
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