Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 15, Issue 29, Pages 12220-12226Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp51942b
Keywords
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Funding
- Wenzhou Medical College, Case Western Reserve University
- NSF [CMMI-1000768]
- AFOSR [FA9550-10-1-0546, FA9550-12-1-0069]
- AFOSR MURI [FA9550-12-1-0037]
- AFRL [FA8650-07-D-5800]
- UTC [11-S587-100-01-C1]
- AFOSR-NBIT [FA2386-10-1-4071]
- Zhejiang Innovation Team from Department of Education [T200917]
- Ministry of Science and Technology of China [2009DFB30380]
- Ministry of Education of China [IRT1077, 211069]
- National Thousand Talents Program'' of China
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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 boron-doped 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.
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