HYDROGEN EVOLUTION OF WATER ELECTROLYSIS ASSISTED BY TITANIUM DIOXIDE AND NICKEL SULFIDE NANOCOMPOSITE

In this work, rhombohedral Ni 3 S 2 nanostructures were hydrothermally synthesized directly on Ni substrate at 180°C for 10 h, by using nickel foil and CH 4 N 2 S as raw materials, and sodium dodecyl sulfonate (SDS) as surfactants. Then the Ni anode with Ni 3 S 2 film and TiO 2 P25 powder were transferred into 40 ml of an aqueous NaOH (10.0 M) and held at 110°C for 48 h to obtain Ni 3 S 2 / TiO 2 nanotubes composite. The results indicate that Ni 3 S 2 could extend the light absorption spectrum of Ni 3 S 2 / TiO 2 nanotubes composite to the visible region. The performance of the modified Ni anode was evaluated by photoassisted electrolysis of water for hydrogen evolution. It was found that the as-synthesized Ni 3 S 2 / TiO 2 nanotube catalysts on Ni substrate have better hydrogen production performance under the visible light irradiation, H 2 -production rate increased by 37.9% in comparison with the Ni anode modified by TiO 2 nanotubes.