One-Step Synthesized Pt-on-NiCo Nanostructures for Oxygen Reduction with High Activity and Long-Term Stability
Figure 4
(a) Steady-state voltammograms for the ORR in O2-saturated HClO4 (0.1 M) solution, at GCE-supported (A) Pt nanoparticles and (B) Pt53-on-NiCo nanostructure surfaces. (b) Steady-state voltammograms for the ORR in O2-saturated HClO4 (0.1 M) solution, at GCE-supported Ptx-on-NiCo nanostructures surfaces with different Pt contents: (A) 53%, (B) 71%, (C) 23%, (D) 12%, and (E) 5%. Rotation rate: 200 rpm; potential was scanned at the disk electrode from 1.0 V to 0.0 V with scan rate of 10 mV s−1. Curves A’ and B’ represent the corresponding Pt ring currents (polarized at 0.7 V).
