Electrocatalytic reductive dehalogenation of polyhalogenated phenols in aqueous solution on Ag electrodes

The electrocatalytic properties of Ag towards the dehalogenation of a variety of polychloro- and polybromo-phenols in basic aqueous solution have been evaluated. Experimental evidence is presented that Ag exhibited powerful electrocatalytic activity for dehalogenation of polyhalogenated phenols to less, or non-halogenated phenols.

Ag appears to be an excellent electrocatalytic material for direct electrodehalogenation of phenolic halides in basic aqueous solution. Complete debromination of polybrominated phenols with excellent current efficiency can be successfully achieved without resorting to the use of organic solvents. The more resistant polychlorinated phenols can also be dehalogenated partially in the catalytic system.Figure optionsDownload as PowerPoint slide