NDLI: The effect of Nafion ionomer on electroactivity of palladium–polypyrrole catalysts for oxygen reduction reaction

Content Provider	Springer Nature Link
Author	Góral Kurbiel, Monika Drelinkiewicz, Alicja Kosydar, Robert Gurgul, Jacek Dembińska, Beata Kulesza, Paweł J.
Copyright Year	2013
Abstract	Present studies concentrated on the preparation, characterization, and electroactivity of palladium–polypyrrole (Pd/PPY) catalysts for oxygen reduction reaction. In particular, the effect of Nafion ionomer on their electroactivity was evaluated. In all catalysts prepared by “water-in-oil” microemulsion method, the Pd nanoparticles of ca. 7 nm in size appeared regardless of the Pd content (ranging from 2 to 20 wt.%). For comparison, carbon black-supported (Vulcan XC-72) catalyst (20 wt.% Pd) was also synthesized. Coating of the Pd/PPY samples with Nafion ionomer reduced their surface area and porosity. Chemical interaction due to Nafion acid functionalities affected the N-state of pyrrole as well as electron state of Pd in the Pd/PPY catalysts. As a result, the contribution of more oxidized palladium (Pdδ+) increased. These interactions played an essential role in the electroactivity of Pd/PPY for oxygen reduction reaction. The increased amount of Nafion relative to that of PPY reduced limiting current density whereas the half-wave potential shifted to a more positive value and the fraction of hydrogen peroxide remarkably decreased.
Starting Page	639
Ending Page	653
Page Count	15
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	18
Issue Number	3
e-ISSN	14330768
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-10-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Palladium Polypyrrole Oxygen reduction reaction Nafion Physical Chemistry Electrochemistry Energy Storage Characterization and Evaluation of Materials Analytical Chemistry Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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