Abstract:

Precursor PbTi₂(OCH₂CH₂OH)_12-x was synthesized by electrolysis of titanium and lead in glycol solution. Nano\|crystalline PbO₂/TiO₂ powder was prepared by direct solgel method from the precursor and then calcined for 2 h at 450 ℃. The metal alkoxide was characterized by FTIR and Raman spectra. The monodisperse structure and the diameter of nanoPbO₂/TiO₂ were observed by XRD and SEM. The results show that PbO₂/TiO₂ of 100—150 nm was obtained. The highly active nanoPbO₂/TiO₂ electrode was prepared via electrosynthesis and solgel method. The cyclic voltammetry was used to study the redox behavior of the nanoPbO₂/TiO₂ electrode in HCl+ OHC(CH₂)₄CHO solution. The current density of the electrode increased obviously and reached to 157 mA/cm2. The electrode potential difference of the redox peaks decreased obviously. The PbO₂/TiO₂ electrode had the high electrocatalytic activities for the oxidation of OHC(CH₂)₄CHO, and the average current efficiency and yield were 89.2% and 97.4% respectively.

Key words:  electrolysis, nanoPbO₂/TiO₂ electrode, electrocatalysis, adipaldehyde