发表刊物：Science

摘要：Controlling the morphology of Pt nanostructures can provide a great opportunity to improve their catalytic properties and increase their activity on a mass basis. We synthesized Pd-Pt bimetallic nanodendrites consisting of a dense array of Pt branches on a Pd core by reducing K2PtCl4 with L-ascorbic acid in the presence of uniform Pd nanocrystal seeds in an aqueous solution. The Pt branches supported on faceted Pd nanocrystals exhibited relatively large surface areas and particularly active facets toward the oxygen reduction reaction (ORR), the rate-determining step in a proton-exchange membrane fuel cell. The Pd-Pt nanodendrites were two and a half times more active on the basis of equivalent Pt mass for the ORR than the state-of-the-art Pt/C catalyst and five times more active than the first-generation supportless Pt-black catalyst.

合写作者：Lim, B.; Jiang, M.; Camargo P. H. C; Cho E. C.; Tao, J.; Lu X.; Zhu, Y. and Xia, Y.

卷号：324,

页面范围：1302

是否译文：否

发表时间：2009-08-06

发布期刊链接：https://www.science.org/doi/10.1126/science.1170377