SnO2-C supported PdNi nanoparticles for oxygen reduction and borohydride oxidation

Šljukić B., Martins M., KAYHAN E., Balčiūnaitė A., Şener T., Sequeira C. A., ...Daha Fazla

Journal of Electroanalytical Chemistry, cilt.797, ss.23-30, 2017 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 797
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.jelechem.2017.05.013
  • Dergi Adı: Journal of Electroanalytical Chemistry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.23-30
  • Anahtar Kelimeler: Borohydride oxidation reaction, Fuel cell electrode, Oxygen reduction reaction, Palladium-nickel alloy, Tin oxide-carbon composite
  • Uşak Üniversitesi Adresli: Evet

Özet

Palladium-nickel nanoparticles supported on different tin oxide-carbon composites, namely PdNi/(SnO2-KB600), PdNi/(SnO2-KB300) and PdNi/(SnO2-graphene), as well as on Vulcan XC-72 (PdNi/Vulcan), are prepared and characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM). The electrocatalytic activity of each material for the oxygen reduction reaction (ORR) and borohydride oxidation reaction (BOR) is studied in alkaline media by voltammetric techniques using rotating disk electrode (RDE) and rotating ring disk electrode (RRDE). ORR and BOR parameters, such as number of exchanged electrons, kinetic current density, Tafel slope and activation energy, are calculated. ORR n values at 0.2 V are close to 4 for PdNi/(SnO2-KB600) and PdNi/Vulcan, and close to 2 for PdNi/(SnO2-KB300) and PdNi/(SnO2-graphene). BOR n values range from 1.9 for PdNi/(SnO2-graphene) to 3.4 for PdNi/(SnO2-KB300). The materials stability is examined by chronoamperometry. The obtained results show that PdNi nanoparticles anchored on SnO2-KB600 support are good electrocatalyst candidates for both ORR and BOR in alkaline media.