Li et al. reported the heteroatom-doped carbon synthesized by pyrolysis of orthoaminophenol/formaldehyde resin . In this study, the effect of oxygen on the capacitive performance of doped carbon electrodes was studied. The DC was prepared by the formation of ortho-aminophenol/formaldehyde sol, and solidified at 100 ˚C for 24 h, and pre-oxidized at 160 ˚C for 24 h in air atmosphere, which was then carbonized at 800 ˚C for 1 h under N2 atmosphere. Further, hydrogen reduction of DC was carried out at 800 ˚C for 1 h under the environment of mix gases with 5% H2, and 95% N2, and the sample was labelled as HRDC.