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Instability of Supported Platinum Nanoparticles in Low-Temperature Fuel Cells |
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| Authors: | Y. Shao-Horn W. C. Sheng S. Chen P. J. Ferreira E. F. Holby D. Morgan |
| Affiliation: | (1) Electrochemical Energy Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;(2) Electrochemical Energy Laboratory, Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;(3) Materials Science and Engineering Program, University of Texas at Austin, Austin, TX 78712, USA;(4) Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA |
| Abstract: | This paper discusses the mechanisms of surface area loss of supported platinum (Pt) electrocatalysts in low-temperature fuel cells. It is argued that submonolayer dissolution of Pt nanoparticles governs the surface area loss at high voltages by increasing the loss of Pt from carbon and coarsening of Pt nanoparticles on carbon. Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. |
| Keywords: | Fuel cell Catalyst Platinum Nanoparticles Durability Dissolution Coarsening Crystal migration Transmission electron microscopy TEM Ostwald ripening Solubility Coalescence |
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