In-Situ Generation of Bi ₂S ₃ to Construct WO ₃/BiVO ₄/Bi ₂S ₃ Heterojunction for Photocathodic Protection of 304SS

Abstract

Photocathodic protection, benefiting from semiconductor materials with outstanding photoelectrochemical characteristics, has raised extensive attention because of its energy-saving and environment-protecting properties. In this work, WO₃/BiVO₄ composite film was synthesized by spin coating and hydrothermal method. BiVO₄ in the composite film reacted with Na₂S, used as electrolyte in the photoelectrochemical cell, to generate Bi₂S₃ in-situ, and constructed a ternary heterojunction WO₃/BiVO₄/Bi₂S₃. As a photoelectrode, it boosted photocathodic protection performance for 304SS. The results revealed that the OCP of

Keywords: In-situ generation, Ternary heterojunction WO3/BiVO4/Bi2S3, Photocathodic protection, 304SS