Ethanol electro-oxidation in alkaline media on Pd/electrodeposited reduced graphene oxide nanocomposite modified nickel foam electrode

Doğan H.

Solid State Sciences, cilt.98, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 98
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.solidstatesciences.2019.106029
  • Dergi Adı: Solid State Sciences
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Electrocatalysis, Ethanol electro-oxidation, Graphene nanocomposite, Palladium nanoparticle, Reduced graphene oxide, EFFICIENT HYDROGEN EVOLUTION, FUEL-CELL, ELECTROCATALYTIC ACTIVITY, PALLADIUM NANOPARTICLE, IN-SITU, OXIDATION, CATALYSTS, PERFORMANCE, ANODE, SUBMONOLAYER
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this work, an electrocatalyst, consisting of Pd nanoparticles in an electrochemically-reduced graphene oxide (Pd/ERGO) nanocomposite, was synthesized by the one-pot simultaneous electrochemical deposition technique, on a Ni foam (NiF) electrode. The structural and morphological characterization of the Pd/ERGO nanocomposite was analyzed using several techniques, such as X-ray diffraction (XRD), XPS, EDS, and scanning electron microscopy (SEM). XPS results for the Pd/ERGO composites showed the successful electrochemical reduction of graphite oxide (GO) to ERGO and the presence of metallic Pd in the nanocomposite structure. The electrooxidation of ethanol on a Pd/ERGO/NiF electrode was then studied using cyclic voltammetry. Electrochemical measurements of the Pd/ERGO composite electrode demonstrated higher electrocatalytic activity (with current density of similar to 130 mA cm(-2)) for ethanol electro-oxidation in an alkaline medium, at room temperature, than for either naked NiF or ERGO-modified NiF (ERGO/NiF) under the same conditions. Further, Pd/ERGO nanocomposite had greater chronoamperometric stability for ethanol electro-oxidation compared to both naked NiF and ERGO/NiF electrodes. The results showed that a nanocomposite modified electrode can be preferred as a potential electrode material for energy storage and conversion applications.