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The Ti-supported lead dioxide electrode(Ti/PdO_2) consisted of a Sb_2O_3/SnO_2 semiconductive interlayer and electrodeposited PbO_2 films was prepared. The optimum ratio of Sb_2O_3 to SnO_2 was 15%~25%. Addition of NaF(0.40 g/L) in electroplating solution could decrease the rate of PbO_2 deposition, which resulted in the formation of small crystal particles and compact PbO_2 films. XRD study showed the β-form crystal of electrode. The electrode was tested in synthesis of 4-picoline acid by electro-oxidation of 4-picoline, showing good electroconductivity and stable life.
The optimum ratio of Sb 2 O 3 to SnO 2 was 15% ~ 25%. Addition of NaF (0.40 g / L) in electroplating solution could decrease the rate of PbO_2 deposition, which resulted in the formation of small crystal particles and compact PbO_2 films. XRD study showed the β-form crystal of electrode. The electrode was tested in synthesis of 4-picoline acid by electro- oxidation of 4-picoline, showing good electroconductivity and stable life.