Multimetallic Au/FePt3 Nanoparticles as Highly Durable Electrocatalyst

作者：Wang Chao; van der Vliet Dennis; More Karren L; Zaluzec Nestor J; Peng Sheng; Sun Shouheng^*; Daimon Hideo; Wang Guofeng; Greeley Jeffrey; Pearson John; Paulikas Arvydas P; Karapetrov Goran; Strmcnik Dusan; Markovic Nenad M; Stamenkovic Vojislav R

来源：Nano Letters, 2011, 11(3): 919-926.

DOI：10.1021/nl102369k

• Electrocatalysis
• multimetallic alloy catalysts
• catalyst durability
• oxygen reduction reaction
• composition profile
• core/shell nanoparticles

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.

• 出版日期2011-3