Electrocatalytic activity for hydrogen evolution of polypyrrole films modified with noble metal particles

Polypyrrole (Ppy) films of various thicknesses containing particles of noble metals such as Pt, Ru and Ir were electrosynthesized on the surface of austenitic stainless steel (Ss). Two different approaches were applied: (i) electrodeposition of a polymer film from a solution already containing an an...

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Published inMaterials chemistry and physics Vol. 98; no. 1; pp. 165 - 171
Main Authors Trueba, Monica, Trasatti, Stefano P., Trasatti, Sergio
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2006
Subjects
Electrocatalysis
Hydrogen evolution
Polypyrrole
Stainless steel
Electrocatalysis
Ru
Pt
Stainless steel
Hydrogen evolution
Ir
Polypyrrole
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Summary:Polypyrrole (Ppy) films of various thicknesses containing particles of noble metals such as Pt, Ru and Ir were electrosynthesized on the surface of austenitic stainless steel (Ss). Two different approaches were applied: (i) electrodeposition of a polymer film from a solution already containing an anionic metal complex, followed by potentiodynamic or galvanostatic reduction; and (ii) presynthesized Ppy films modified by galvanostatic electrodeposition of noble metals from solutions of the metal complexes. Surface morphology and composition of the resulting layers were studied by means of SEM and XPS. The electrocatalytic activity of the modified electrodes for the hydrogen evolution reaction (her) was tested in 0.05 M H 2SO 4 by means of potentiodynamic techniques (0.5 mV s −1).
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2005.09.031