“…According to the equations shown in the Supporting Information, the calculated S a of N-doped carbon (205.7 m 2 /g) is significantly greater than that of nondoped carbon (55.5 m 2 /g). Since it was reported that nitrogen-plasma treated inorganic (metal, oxide) , and organic materials (polymer and wool fabrics) , exhibited a dramatic improvement in hydrophilicity and wettability due to the generation of CN, CN, and amide bonds after plasma irradiation, the facilitating access of solvated and charged ions on N-doped carbon can associate with the doped functional N atoms. 3 Cyclic voltammograms (a) and Nyquist plots of EIS (b) for nondoped and N-doped carbon electrodes recorded in 0.5 M H 2 SO 4 .…”
Shell−core nanostructured carbon materials with a nitrogen-doped graphitic layer as a shell and pristine carbon
black particle as a core were synthesized by carbonizing the hybrid materials containing in situ polymerized aniline
onto carbon black. In an N-doped carbon layer, the nitrogen atoms substitute carbon atoms at the edge and interior
of the graphene structure to form pyridinic N and quaternary N structures, respectively. As a result, the carbon structure
becomes more compact, showing curvatures and disorder in the graphene stacking. In comparison with nondoped
carbon, the N-doped one was proved to be a suitable supporting material to synthesize high-loading Pt catalysts (up
to 60 wt %) with a more uniform size distribution and stronger metal−support interactions due to its high electrochemically
accessible surface area, richness of disorder and defects, and high electron density. Moreover, the more rapid charge-transfer rates over the N-doped carbon material are evidenced by the high crystallinity of the graphitic shell layer with
nitrogen doping as well as the low charge-transfer resistance at the electrolyte/electrode interface. Beneficial roles
of nitrogen doping can be found to enhance the CO tolerance of Pt catalysts. Accordingly, an improved performance
in methanol oxidation was achieved on a high-loading Pt catalyst supported by N-doped carbon. The enhanced catalytic
properties were extensively discussed based on mass activity (Pt utilization) and intrinsic activity (charge-transfer rate).
Therefore, N-doped carbon layers present many advantages over nondoped ones and would emerge as an interesting
supporting carbon material for fuel cell electrocatalysts.
“…According to the equations shown in the Supporting Information, the calculated S a of N-doped carbon (205.7 m 2 /g) is significantly greater than that of nondoped carbon (55.5 m 2 /g). Since it was reported that nitrogen-plasma treated inorganic (metal, oxide) , and organic materials (polymer and wool fabrics) , exhibited a dramatic improvement in hydrophilicity and wettability due to the generation of CN, CN, and amide bonds after plasma irradiation, the facilitating access of solvated and charged ions on N-doped carbon can associate with the doped functional N atoms. 3 Cyclic voltammograms (a) and Nyquist plots of EIS (b) for nondoped and N-doped carbon electrodes recorded in 0.5 M H 2 SO 4 .…”
Shell−core nanostructured carbon materials with a nitrogen-doped graphitic layer as a shell and pristine carbon
black particle as a core were synthesized by carbonizing the hybrid materials containing in situ polymerized aniline
onto carbon black. In an N-doped carbon layer, the nitrogen atoms substitute carbon atoms at the edge and interior
of the graphene structure to form pyridinic N and quaternary N structures, respectively. As a result, the carbon structure
becomes more compact, showing curvatures and disorder in the graphene stacking. In comparison with nondoped
carbon, the N-doped one was proved to be a suitable supporting material to synthesize high-loading Pt catalysts (up
to 60 wt %) with a more uniform size distribution and stronger metal−support interactions due to its high electrochemically
accessible surface area, richness of disorder and defects, and high electron density. Moreover, the more rapid charge-transfer rates over the N-doped carbon material are evidenced by the high crystallinity of the graphitic shell layer with
nitrogen doping as well as the low charge-transfer resistance at the electrolyte/electrode interface. Beneficial roles
of nitrogen doping can be found to enhance the CO tolerance of Pt catalysts. Accordingly, an improved performance
in methanol oxidation was achieved on a high-loading Pt catalyst supported by N-doped carbon. The enhanced catalytic
properties were extensively discussed based on mass activity (Pt utilization) and intrinsic activity (charge-transfer rate).
Therefore, N-doped carbon layers present many advantages over nondoped ones and would emerge as an interesting
supporting carbon material for fuel cell electrocatalysts.
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