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Influence of physicochemical properties on the performance of Pt/C porous electrodes for oxygen reduction in phosphoric acid

โœ Scribed by N. Giordano; E. Passalacqua; P.L. Antonucci; L. Pino; M. Vivaldi; A. Patti; K. Kinoshita

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
548 KB
Volume
38
Category
Article
ISSN
0013-4686

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โœฆ Synopsis

Oxygen reduction on Pt supported on carbon black in PTFE-bonded porous electrodes in 98% H,PO, at 170ยฐC was investigated. The influence of the Pt surface area and the volume of H,PO, in the electrode structure (per cent acid occupation, PAO) on the performance of porous electrodes (ie current-potential behavior, potential at a constant current density of 200mAcm-2, oxygen gain) were evaluated. The results clearly show that the Pt surface area has a major influence on the Tafel slope, electrode polarization, electrode potential decay at constant current density, and oxygen gain. On the other hand, these parameters do not show a clear trend with PAO.

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