Abstract: TiO₂ hollow nanofiber was prepared via coaxial electrospinning technique and TiO₂ hollow nanofiber supported CoB catalyst was synthesized by in-situ reduction impregnation.TG analysis revealed that TiO₂ hollow nanofiber precursors should be sintered above 600 ℃ to obtain pure inorganic TiO₂ nanofiber.SEM characterization showed that a remarkable morphological change of TiO₂，such as rougher of nanofiber surface and thinner nanofiber etc.could be found after thermal treatment and hollow nanofiber microstructure of TiO₂ could be obviously observed.CoB/TiO₂ catalyst was used in hydrogen production from NaBH₄ hydrolysis which exhibited highly catalytic activity［2 650.0 mL/（min·g）］ due to high specific surface area.Experimental results demonstrated that CoB/TiO₂ catalyst had a promising potential in application.

Key words: electrospinning, TiO₂ hollow nanofiber, CoB/TiO₂ catalyst, NaBH₄