Three-dimensional B,N-doped Graphene Foam as a Metal-free Catalyst for Oxygen Reduction Reaction
CASE WESTERN RESERVE UNIV CLEVELAND OH
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Using a modified chemical vapor deposition CVD method, we have prepared a class of new graphene foams GFs doped with nitrogen, boron or both. Nitrogen-doped graphene foams N-GFs with a nitrogen doping level of 3.1 atom were prepared by CVD of CH4 in the presence of NH3 while borondoped graphene foams B-GFs with a boron doping level of 2.1 atom were produced by using toluene and triethyl borate as a carbon and a boron source. On the other hand, graphene foams co-doped with nitrogen 4.5 atom and boron 3 atom BN-GFs were prepared by CVD using melamine diborate as the precursor. In all cases, scanning electron microscope SEM images revealed well-defined foam-like microstructures, while electrochemical measurements showed much higher electrocatalytic activities toward oxygen reduction reaction for the doped graphene foams than their undoped counterparts.
- Industrial Chemistry and Chemical Processing
- Inorganic Chemistry
- Physical Chemistry