Photoelectrochemical behaviour of WO3 and Se-WO3 films modified with cobalt-based oxygen evolving catalyst

Simona Ostachavičiūtė; Agnė Šulčiūtė; Eugenijus Valatka

doi:10.6001/chemija.2017.28.2.2

Simona Ostachavičiūtė
Agnė Šulčiūtė
Eugenijus Valatka

DOI: https://doi.org/10.6001/chemija.2017.28.2.2

Keywords: tungsten trioxide (WO3), mixed tungsten trioxide–selenium ﬁlm, oxygen evolution catalyst, electrodeposition, stainless steel

Abstract

Thin ﬁlms of bare and Se-containing tungsten trioxide (WO3) on AISI304 stainless steel were prepared by electrochemical deposition using peroxy-tungstate solutions. Cobalt-phosphate catalyst was photochemically deposited onto the surface of semiconductor particles in order to enhance their activity towards the oxygen evolution reaction. The photoelectrochemical properties of as-prepared electrodes were investigated in neutral 0.1 M phosphate buffer solutions. The voltammetric characteristics revealed that the presence of cobalt-based catalyst effectively changes the photoelectrocatalytic activity of WO3 and Se-WO3 particles.