@article{eddbb4f127974cefa855bf7c32180df4,
title = "Platinum-coated nickel nanowires as oxygen-reducing electrocatalysts",
abstract = "Platinum (Pt)-coated nickel (Ni) nanowires (PtNiNWs) are synthesized by the partial spontaneous galvanic displacement of NiNWs, with a diameter of 150-250 nm and a length of 100-200 μm. PtNiNWs are electrochemically characterized for oxygen reduction (ORR) in rotating disk electrode half-cells with an acidic electrolyte and compared to carbon-supported Pt (Pt/HSC) and a polycrystalline Pt electrode. Like other extended surface catalysts, the nanowire morphology yields significant gains in ORR specific activity compared to Pt/HSC. Unlike other extended surface approaches, the resultant materials have yielded exceptionally high surface areas, greater than 90 m2 g Pt-1. These studies have found that reducing the level of Pt displacement increases Pt surface area and ORR mass activity. PtNiNWs produce a peak mass activity of 917 mA mgPt-1, 3.0 times greater than Pt/HSC and 2.1 times greater than the U.S. Department of Energy target for proton-exchange membrane fuel cell activity.",
keywords = "electrocatalysis, electrochemistry, fuel cells, galvanic displacement, oxygen reduction reaction",
author = "Alia, {Shaun M.} and Larsen, {Brian A.} and Svitlana Pylypenko and Cullen, {David A.} and Diercks, {David R.} and Neyerlin, {K. C.} and Kocha, {Shyam S.} and Pivovar, {Bryan S.}",
year = "2014",
month = apr,
day = "4",
doi = "10.1021/cs401081w",
language = "English",
volume = "4",
pages = "1114--1119",
journal = "ACS Catalysis",
issn = "2155-5435",
publisher = "American Chemical Society",
number = "4",
}
