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Formation, microstructural characteristics and stability of carbon supported platinum catalysts for low temperature fuel cells

Authors
  • Antolini, E.1
  • 1 Scuola di Scienza di Materiali, Via 25 Aprile 22, Cogoleto (Genova), 16016, Italy , Cogoleto (Genova)
Type
Published Article
Journal
Journal of Materials Science
Publisher
Springer-Verlag
Publication Date
Jul 01, 2003
Volume
38
Issue
14
Pages
2995–3005
Identifiers
DOI: 10.1023/A:1024771618027
Source
Springer Nature
Keywords
License
Yellow

Abstract

Supported platinum electrocatalysts are generally used in low temperature fuel cells to enhance the rates of the hydrogen oxidation and oxygen reduction reactions. In such catalysts, the high surface to volume ratios of the platinum particles maximize the area of the surfaces available for reaction. It is the structure and proper dispersal of these platinum particles that make low-loading catalysts feasible for fuel cell operation, lowering the cost of the system. If the platinum particles cannot maintain their structure over the lifetime of the fuel cell, change in the morphology of the catalyst layer from the initial state will result in a loss of electrochemical activity. This loss of activity in the platinum/carbon catalysts due to the agglomeration of platinum particles is considered to be a major cause of the decrease in cell performance, especially in the case of the cathode. In the light of the latest advances on this field, this paper reviews the preparation methods of these catalysts, their microstructural characteristic and their effect on both thermal and in cell conditions stability.

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