Preparation and electrocatalytic activity of tungsten carbide and titania nanocomposite

► Electrocatalytic activity of tungsten carbide and titania nanocomposite with core-shell structure. ► Activity is related to the structure, crystal phase and chemical component of the nanocomposite. ► The property of electrolyte affects the electrocatalytic activity. ► A synergistic effect exists between tungsten carbide and titania of the composite.