Journal
ACS NANO
Volume 8, Issue 10, Pages 10837-10843Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn504637y
Keywords
oxygen reduction reaction; electrocatalyst; boron nitrogen doping; graphene quantum dots; coal
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Funding
- ONR MURI program [00006766, N00014-09-1-1066]
- Air Force Office of Scientific Research [FA9550-09-1-0581]
- AFOSR MURI program [FA9550-12-1-0035]
- China Scholarship Council
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The scarcity and high cost of platinum-based electrocatalysts for the oxygen reduction reaction (ORR) has limited the commercial and scalable use of fuel cells. Heteroatom-doped nanocarbon materials have been demonstrated to be efficient alternative catalysts for ORR. Here, graphene quantum dots, synthesized from inexpensive and earth-abundant anthracite coal, were self-assembled on graphene by hydrothermal treatment to form hybrid nanoplatelets that were then codoped with nitrogen and boron by high-temperature annealing. This hybrid material combined the advantages of both components, such as abundant edges and doping sites, high electrical conductivity, and high surface area, which makes the resulting materials excellent oxygen reduction electrocatalysts with activity even higher than that of commercial Pt/C in alkaline media.
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