Electrooxidation of 4-clorphenol on modified lead dioxide anodes
2018
The electrochemical oxidation of 4-chlorophenol on lead dioxide anodes micromodified
by ions of iron group has been investigated. As follows from the data obtained, the rate of
oxidation of organic substances on the anode materials involved is proportional to the
number of reactive oxygen species in the near-electrode zone (OH–radicals) formed during
the electrolysis as intermediates in water oxidation and participating in subsequent
homogeneous chemical reactions with organic substrates in the bulk. The O1s peak on X–
Ray photoelectron spectra was used to evaluate the amount of inert and labile oxygencontaining particles on undoped and doped PbO2
. Doping of lead dioxide with nickel
leads to a significant increase in the number of labile oxygen-containing particles on the
surface of the electrode, while iron modification leads to the opposite effect – an increase
in the amount of inert oxygen-containing particles. The anodic oxidation of 4-chlorophenol
yields a rather large number of intermediate products. The main intermediates include
benzoquinone and maleic acid which was confirmed by high-performance liquid
chromatography. The micromodification of lead dioxide with metal ions of iron group
leads to a significant change in the electrocatalytic activity of oxide materials. The activity
grows in the following sequence of modifying ions: PbO2
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
0
References
2
Citations
NaN
KQI