Fabrication of underpotentially deposited Cu monolayer/electrochemically reduced graphene oxide layered nanocomposites for enhanced ethanol electro-oxidation

ÖZNÜLÜER T., Demir U., Dogan H. O.

Applied Catalysis B: Environmental, cilt.235, ss.56-65, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 235
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.apcatb.2018.04.065
  • Dergi Adı: Applied Catalysis B: Environmental
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.56-65
  • Anahtar Kelimeler: Electrochemical reduced graphene oxide, Nanocomposite, Electrochemical oxidation of ethanol, Electrocatalysis, PLATINUM MONOLAYER ELECTROCATALYSTS, SCANNING-TUNNELING-MICROSCOPY, MODIFIED AU(111) ELECTRODES, WORK FUNCTION DIFFERENCES, ALKALINE MEDIA, THIN-FILMS, FACILE SYNTHESIS, CATALYTIC PERFORMANCE, ALLOYED CATALYSTS, ANODIC-OXIDATION
  • Atatürk Üniversitesi Adresli: Evet

Özet

Cu monolayer/electrochemically reduced graphene oxide (ML/ERGO) layered nanocomposites are grown on Au substrates by sequential underpotential deposition of Cu(ML)s and electrochemical reduction of graphene oxide for the electrocatalytic oxidation of ethanol. Characterization of the Au-Cu(ML)/ERGO layered composites by scanning electron microscopy and scanning tunneling microscopy reveal that the smooth Cu(ML) on the Au surface is transformed into parallel aligned nanoparticles after modification by the ERGO layer. X-ray photoelectron spectroscopy and Raman spectroscopy results for the Au-Cu(ML)/ERGO composites show the successful electrochemical reduction of GO to ERGO and the presence of metallic Cu in the nanocomposite structure. Electrochemical measurements of the as-prepared Au-(Cu(ML)/ERGO)(1) electrodes exhibit excellent electrocatalytic performance (15 mA cm(-2)), which was 5.7 and 1.6 times higher than those from the naked Au and Au-Cu(ML) electrodes, respectively, toward ethanol electro-oxidation in alkaline condition.