| 초록 |
A new strategy for enhancing the oxygen reduction reaction (ORR) activity of carbon-based catalysts in acidic media is proposed and characterized: modification through the dual doping of nitrogen and phosphorous into the carbon. In the ORR, the onset potential of the prepared catalysts was 0.6 V (vs. Ag/AgCl) in 1 M HClO4. The N-doped carbon records -0.69 mA/mg of mass activity at 0.5 V (vs. Ag/AgCl), but additional P-doping results in more than fourfold increase of activity: -2.88 mA/mg. Moreover, additional P-doping also modifies the ORR pathway, as N-doped carbon induces more than 10 % of H2O2, but the P, N-doped carbon produced below 1 % of H2O2 during the ORR. |
