Abstract
In this study, by using thiocyanate as an iron ion dispersing agent, the pinning effect of thiocyanate ion (SCN−) enables the high dispersion of Fe3+ in a nitrogen-doped carbon polymer and significantly promotes ORR catalysis in both acidic and alkaline media. It shows 47.3 A g−1 kinetic ORR current density in 0.1 M H2SO4 solution at 0.8 V vs. RHE. In addition, SCN− can dope into the base material and modify the surface of catalysts, which generates strong cyanide N functional groups. Additionally, it also has a higher BET surface area and more uniform granularity, which accounts for the enhancement in mass transport.
Original language | English |
---|---|
Pages (from-to) | 161-167 |
Number of pages | 7 |
Journal | Journal of Power Sources |
Volume | 376 |
DOIs | |
State | Published - 1 Feb 2018 |
Externally published | Yes |
Keywords
- Acid medium
- Direct methanol fuel cell
- H/Ofuel cells
- Oxygen reduction reaction