Synthetic
Control
of FePtM Nanorods (M = Cu, Ni) To Enhance
the Oxygen Reduction Reaction
- Publication date
- Publisher
Abstract
To
further
enhance the catalytic activity and durability of nanocatalysts for
the oxygen reduction reaction (ORR), we synthesized a new class of
20 nm × 2 nm ternary alloy FePtM (M = Cu, Ni) nanorods (NRs)
with
controlled compositions. Supported on carbon support and treated with
acetic acid as well as electrochemical etching, these FePtM NRs were
converted into core/shell FePtM/Pt NRs. These core/shell NRs, especially
FePtCu/Pt NRs, exhibited much improved ORR activity and durability.
The Fe<sub>10</sub>Pt<sub>75</sub>Cu<sub>15</sub> NRs showed a mass
current densities of 1.034 A/mg<sub>Pt</sub> at 512 mV vs Ag/AgCl
and 0.222 A/mg<sub>Pt</sub> at 557 mV vs Ag/AgCl, which are much higher
than those for a commercial Pt catalyst (0.138 and 0.035 A/mg<sub>Pt</sub>, respectively). Our controlled synthesis provides a general
approach to core/shell NRs with enhanced catalysis for the ORR or
other chemical reactions