@inproceedings{f0ee02016ced4c6e82a46e06a6af5b75,
title = "Coarsening of Pt nanoparticles in proton exchange membrane fuel cells upon potential cycling",
abstract = "Two different Pt/C samples (Pt/Vulcan and Pt/C-high-surface-area) were subject to potential cycling between 0.6V and 1.0V vs. reversible hydrogen electrode, where significant platinum area loss was found. Both cycled MEA cathode samples were examined and compared in detail by glancing angle X-ray powder Diffraction and transmission electron microscopy (TEM) to reveal processes responsible for observed platinum loss. TEM data and analyses of pristine and cycled Pt/C catalyst and cross-sectional MEA cathode samples unambiguously confirmed that coarsening of platinum particles occurred via two different processes as reported recently1: i) Ostwald ripening on carbon at the nanometer-scale; and ii) diffusion of soluble platinum species in the ionomer phase at the micrometer-scale, chemical reduction of these species by crossover H2 molecules and precipitation of platinum particles in the cathode ionomer phase. copyright The Electrochemical Society.",
author = "Y. Shao-Horn and Ferreira, {P. J.} and {La O}, {G. J.} and D. Morgan and H. Gasteiger and R. Makharia",
year = "2006",
doi = "10.1149/1.2214553",
language = "English",
isbn = "1566774918",
series = "ECS Transactions",
publisher = "Electrochemical Society Inc.",
number = "8",
pages = "185--195",
booktitle = "Durability and Reliability of Low-Temperature Fuel Cells Systems",
edition = "8",
note = "Symposium on Durability and Reliability of Low-Temperature Fuel Cells Systems - 208th Meeting of the Electrochemical Society ; Conference date: 16-10-2005 Through 21-10-2005",
}