Herein, titanium nitride (TN) nano cluster was synthesized through NH3 nitrification of titania nanotubes. The effect of nitrification temperature on the formation of TN was investigated by characterizations of X-ray diffractometer, Transmission electron microscopy, Diffuse reflectance UV-vis spectra, X-ray photoelectron spectroscopy, etc. The TN-900, nitrificated at 900 degrees C, demonstrated high hydrogen (H-2) yield in visible light-induced water splitting owing to a narrow energy band gap, unique nano-cluster structure, reasonable surface area and excellent electrical conductivity, which promoted light harvesting, reactant adsorption, and photo-electron-hole separation.Graphical Abstract>Titanium itride (TN) nano-clusters were synthesized through NH3 nitrification of titania nanotubes. The TN-900, nitrificated at 900 degrees C, exhibited high H-2 yield and good recycle usability in visible light-induced water splitting owing to a narrow energy band gap, unique nano-cluster structure, reasonable surface area and excellent electrical conductivity, which promoted light harvesting, reactant adsorption, and photo-electron-hole separation. [GRAPHICS]