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The investigation on the mechanism of electrochemical hydrogen storage in sandwich nickel foam/palladium/carbon nanofibers electrodes.
Skowronski, J M; Rozmanowski, T; Krawczyk, P; Rogulski, Z; Czerwinski, A.
Afiliação
  • Skowronski JM; Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, ul. Piotrowo 3, 60-965 Poznan, Poland.
J Nanosci Nanotechnol ; 9(6): 3858-65, 2009 Jun.
Article em En | MEDLINE | ID: mdl-19504932
The kinetics of the process of reversible hydrogen sorption occurring in/on the nickel foam/palladium/carbon nanofibers (Ni/Pd/CNFs) electrodes is examined. It was shown that the hydrogen sorption/desorption properties for palladium can be altered after Pd layer is sandwiched between nickel foam and carbon nanofibers (CNF) layers. The layered Ni/Pd/CNFs electrodes were prepared by a two-step method consisting of chemical deposition of a very thin palladium layer on the Ni foam surface to form Ni/Pd electrodes followed by coating the Pd surface with the CNF layer by the CVD method. The process of hydrogen sorption/desorption into/from Ni/Pd as well as Ni/Pd/CNF electrodes was examined in alkaline electrolyte using the cyclic voltammetry method. The presence of CNF layer on the Pd surface exerts a great influence on the mechanism of the anodic desorption of hydrogen. A new anodic peak of hydrogen desorption revealed for Ni/Pd/CNF electrodes is ascribed to hydrogen storage in CNF phase. The CV measurements showed distinct differences between the rate of hydrogen release from the palladium and carbon phase.
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Nanosci Nanotechnol Ano de publicação: 2009 Tipo de documento: Article
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Nanosci Nanotechnol Ano de publicação: 2009 Tipo de documento: Article