Bulk Phosphorus-Doped Graphitic Carbon
- Billeter, Emanuel [ Montana State University: Chemistry & Biochemistry ] [ Swiss Fed Inst Technol, Dept Chem & Appl Biosci, Inorgan Chem Lab, CH-8093 Zurich, Switzerland ]
- McGlamery, Devin [ Montana State University: Chemistry & Biochemistry ]
- Aebli, Marcel [ Swiss Fed Inst Technol, Dept Chem & Appl Biosci, Inorgan Chem Lab, CH-8093 Zurich, Switzerland ]
- Piveteau, Laura [ Swiss Fed Inst Technol, Dept Chem & Appl Biosci, Inorgan Chem Lab, CH-8093 Zurich, Switzerland ]
- Kovalenko, Maksym V. [ Swiss Fed Inst Technol, Dept Chem & Appl Biosci, Inorgan Chem Lab, CH-8093 Zurich, Switzerland ] [ Empa Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland ]
- Stadie, Nicholas P. [ Montana State University: Chemistry & Biochemistry ]
A direct synthetic route to a tunable range of phosphorus-doped graphitic carbon materials is demonstrated via the reaction of benzene and phosphorus trichloride in a closed reactor at elevated temperatures (800-1050 degrees C). Graphitic materials of continuously variable composition PC,, up to a limit of approximately x = 5 are accessible, where phosphorus is incorporated both substitutionally within the graphite lattice and as stabilized P-4 molecules. Higher temperatures result in a more ordered graphitic lattice, while the maximum phosphorus content is not observed to diminish. Lower temperatures and higher initial phosphorus content in the reaction mixture are shown to correlate with higher structural disorder. Phosphorus incorporation within directly synthesized PC, as both a substitutional dopant and in the form of interstitial, stabilized molecular P-4,d is demonstrated to occur with little oxygen contamination in the bulk (<4 atom %), motivating promising future applications in fuel cells and alkali metal-ion batteries.