Hydrodehalogenation　(HDH)　of　2,4-dichlorophenol　(2,4-DCP)　on　a　palladium-nickel　(Pd-Ni)　bimetallic　electrode　was　investigated　in　this　paper.　The　Pd-Ni　bimetallic　electrode　was　prepared　on　meshed　titanium　(Ti)　substrate　by　electrochemical　deposition　with　assistance　of　sodium　dodecyl　benzene　sulfonate　(SDBS).　Cyclic　voltammetry　(CV)　results　revealed　that　the　hydrogen　adsorption　peak　current　value　of　electrode　became　larger　when　SDBS　was　added　in　electrode　preparation　process.　The　structure　and　composition　of　the　electrode　were　characterized　by　scanning　electron　microscopy　(SEM),　inductively　coupled　plasma-atomic　emission　spectrometry　(ICP-AES)　and　X-ray　diffraction　(XRD).　Dechlorination　experiment　was　conducted　on　the　Pd-Ni(SDBS)/Ti　electrode　in　the　presence　of　100　mg　L-1　(0.61　mmol　L-1)　2,4-DCP.　The　removal　efficiency　of　2,4-DCP　reached　100%　with　dechlorination　current　of　5　mA　within　70　min　in　aqueous　solution,　meanwhile　the　current　efficiency　was　33.9%.　The　Pd-Ni(SDBS)/Ti　electrode　exhibits　a　good　application　prospect　for　electrocatalytic　degradation　of　2,4-DCP.　Copyright　(c)　2012,　Hydrogen　Energy　Publications,　LLC.　Published　by　Elsevier　Ltd.　All　rights　reserved.