PlumX Metrics
Embed PlumX Metrics

Metal-free Ketjenblack incorporated nitrogen-doped carbon sheets derived from gelatin as oxygen reduction catalysts

Nano Letters, ISSN: 1530-6992, Vol: 14, Issue: 4, Page: 1870-1876
2014
  • 152
    Citations
  • 0
    Usage
  • 85
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

Article Description

Electrocatalysts facilitating oxygen reduction reaction (ORR) are vital components in advanced fuel cells and metal-air batteries. Here we report Ketjenblack incorporated nitrogen-doped carbon sheets derived from gelatin and apply these easily scalable materials as metal-free electrocatalysts for ORR. These carbon nanosheets demonstrate highly comparable catalytic activity for ORR as well as better durability than commercial Vulcan carbon supported Pt catalysts in alkaline media. Physico-chemical characterization and theoretical calculations suggest that proper combination of graphitic and pyridinic nitrogen species with more exposed edge sites effectively facilitates a formation of superoxide, [O], via one-electron transfer, thus increasing catalytic activities for ORR. Our results demonstrate a novel strategy to expose more nitrogen doped edge sites by irregular stacked small sheets in developing better electrocatalysts for Zn-air batteries. These desirable architectures are embodied by an amphiphlilic gelatin mediated compatible synthetic strategy between hydrophobic carbon and aqueous water. © 2014 American Chemical Society.

Bibliographic Details

Nam, Gyutae; Park, Joohyuk; Kim, Sun Tai; Shin, Dong-bin; Park, Noejung; Kim, Youngsik; Lee, Jang-Soo; Cho, Jaephil

American Chemical Society (ACS)

Chemical Engineering; Chemistry; Materials Science; Physics and Astronomy; Engineering

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know