Bilayer n-WO3/p-Cu2O photoelectrode with photocurrent enhancement in aqueous electrolyte photoelectrochemical reaction

Lorna Effery Minggu, Kim Hang Ng, Hasmida Abdul Kadir, Mohammad Kassim

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Bilayer n-WO3/p-Cu2O photoelectrode films on fluorine-doped tin oxide (FTO) coated glass have been synthesized by consecutive electrodeposition of tungsten trioxide (n-WO3) and cuprous oxide (p-Cu2O) films from acidic aqueous solution of peroxytungstate and basic aqueous solution of copper sulfate-lactic acid by electrodeposition method. The WO3 film was annealed at 350 °C for 30 min to obtain a crystalline WO3 before the second layer of Cu2O was incorporated. Photoelectrochemical characterization of the WO3, Cu2O and WO3/Cu2O photoelectrodes were carried out under 100 W xenon light illumination, in 0.5 M Na2SO4 solution with saturated calomel electrode (SCE) as a reference and a platinum wire as the counter electrode. Investigation on the oxidative nature of the Cu2O on both mono and bilayer electrode films was carried out and a mechanism scheme was suggested. The photocurrent generated by n-WO3/p-Cu2O bilayer photoelectrode was much higher compared to the plain n-WO3 and p-Cu2O.

Original languageEnglish
Pages (from-to)16015-16021
Number of pages7
JournalCeramics International
Volume40
Issue number10
DOIs
Publication statusPublished - 1 Dec 2014

Fingerprint

Photocurrents
Electrolytes
Electrodeposition
Electrodes
Copper Sulfate
Xenon
Fluorine
Lactic acid
Platinum
Tin oxides
Tungsten
Lactic Acid
Lighting
Wire
Crystalline materials
Copper
Glass
Oxides

Keywords

  • CuO
  • Electrodeposition
  • Photoelectrochemical
  • Photoelectrode
  • WO

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Bilayer n-WO3/p-Cu2O photoelectrode with photocurrent enhancement in aqueous electrolyte photoelectrochemical reaction. / Effery Minggu, Lorna; Ng, Kim Hang; Kadir, Hasmida Abdul; Kassim, Mohammad.

In: Ceramics International, Vol. 40, No. 10, 01.12.2014, p. 16015-16021.

Research output: Contribution to journalArticle

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