Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1292326 | Journal of Power Sources | 2016 | 7 Pages |
•Abundant structural defects on graphene enhance the ORR activity.•Balanced N distribution on graphene could also improve the ORR activity.•Structural defects and N distribution are adjusted by regulating temperature.•NG-1000 shows notable ORR activities in both alkaline and acid media.
N-doped graphene (NG) is a promising candidate for oxygen reduction reaction (ORR) in the cathode of fuel cells. However, the catalytic activity of NG is lower than that of commercial Pt/C in alkaline and acidic media. In this study, NG samples were obtained using urea as N source. The structural defects and N distribution in the samples were adjusted by regulating the pyrolysis temperature. The new NG type exhibited remarkable catalytic activities for ORR in both alkaline and acidic media.