Abstract: Lead alkoxide complexes were prepared by electrochemical dissolution of pure lead in the glycol solution. The PbO sols were achieved by the direct sol-gel process of electrolyte solution. The PbO sols coated on pure titanium substrate were calcined at 450 ℃ for 2 h in a muffle furnace, the nano-PbO/Ti electrode was obtained. The electrocatalytic reduction activity of the nano-PbO/Ti electrode was investigated by cyclic voltammetry(CV) in solution containing 0.2~1.0 mol/L LiOH and 0.1~0.5 mol/L LiBO2. The main factors of electrocatalytic reduction of LiBO2 to LiBH4, such as LiBO2 and LiOH concentrations, were studied. The mono-disperse structure and the diameter of nano-PbO/Ti electrode were observed by XRD and SEM, respectively. The results show that the nano PbO is uniformly dispersed on the electrode surface. The electrocatalytic reduction performance of nano-PbO/Ti electrode is stable. A yield of 15.6% and current efficiency of 25.3% were obtained respectively.

Key words: nano-PbO/Ti electrode, electro-catalytic reduction, LiBH4, current efficiency