Figure 6.
Electrochemically active surface area: The CV curves for (a) Fe-Hf/N/C and (b) Fe/N/C electrodes under various sweep rates. The ECSA of (c) Fe-Hf/N/C and (d) Fe/N/C electrodes under various sweep rates.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.