Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 19, Pages 7130-7133Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja403041g
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Funding
- U.S. Army Research Laboratory
- U.S. Army Research Office under the Multi University Research Initiative (MURI) [W911NF-11-1-0353]
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
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To further enhance the catalytic activity and durability of nanocatalysts for the oxygen reduction reaction (ORR), we synthesized a new class of 20 nm X 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 Fe10Pt75Cu15 NRs showed a mass current densities of 1.034 A/mg(Pt) at 512 mV vs Ag/AgCl and 0.222 A/mg(Pt) at 557 mV vs Ag/AgCl, which are much higher than those for a commercial Pt catalyst (0.138 and 0.035 A/mg(Pv) respectively). Our controlled synthesis provides a general approach to core/shell NRs with enhanced catalysis for the ORR or other chemical reactions.
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