Abstract
We report the design and synthesis of multimetallic Au/Pt-bimetallic nanoparticles as a highly durable electrocatalyst for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. This system was first studied on well-defined Pt and FePt thin films deposited on a Au(111) surface, which has guided the development of novel synthetic routes toward shape-controlled Au nanoparticles coated with a Pt-bimetallic alloy. It has been demonstrated that these multimetallic Au/FePt3 nanoparticles possess both the high catalytic activity of Pt-bimetallic alloys and the superior durability of the tailored morphology and composition profile, with mass-activity enhancement of more than 1 order of magnitude over Pt catalysts. The reported synergy between well-defined surfaces and nanoparticle synthesis offers a persuasive approach toward advanced functional nanomaterials.
Original language | English |
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Pages (from-to) | 919-926 |
Number of pages | 8 |
Journal | Nano Letters |
Volume | 11 |
Issue number | 3 |
DOIs | |
State | Published - Mar 9 2011 |
Keywords
- Electrocatalysis
- catalyst durability
- composition profile
- core/shell nanoparticles
- multimetallic alloy catalysts
- oxygen reduction reaction