Electrochemically　reductive　dechlorination　of　2,4-dichlorophenol　in　aqueous　solution　was　investigated　on　palladium/polymeric　pyrrole　film/foam-nickel　(Pd/PPy/foam-Ni)　electrode　at　ambient　temperature.　Pd/PPy/foam-Ni　electrode,　which　provided　catalytic　surface　for　reductive　dechlorination　of　2,4-dichlorophenol,　was　prepared　with　an　electrodepositing　method.　Cyclic　voltammetry　(CV)　tests　reveal　that　the　hydrogen　adsorption　peak　current　on　Pd/PPy/foam-Ni　electrode　was　-150.4　mA.　Scanning　electron　microscope　(SEM)　images　show　that　PPy　film　modified　the　electrode　surface　characteristics.　The　dechlorination　experimental　results　indicate　that　2,4-dichlorophenol　removal　efficiency　of　99.4%　and　current　efficiency　of　33.6%　on　Pd/PPy/foam-Ni　electrode　could　be　obtained　under　the　conditions　of　dechlorination　current　of　5　mA　and　dechlorination　time　of　70　min　in　aqueous　solution.　The　analysis　of　HPLC　identifies　that　the　final　products　were　mainly　phenol.　(C)　2010　Elsevier　B.V.　All　rights　reserved.