In　this　work,　the　PtAg2/C-D　and　PtPd3Ag5/C-D　catalysts　with　Pt-rich　surfaces　were　fabricated　via　chemical　reduction　following　electrochemical　dealloying.　The　as-prepared　catalysts　were　characterized　by　X-ray　diffraction　(XRD),　transmission　electron　spectroscopy　(TEM),　atomic　adsorption　spectroscopy　(AAS),　X-ray　electron　spectroscopy　(XPS)　and　electrochemical　methods　It　is　found　that　external　Ag　atoms　are　dealloyed　by　the　cyclic　voltammetry　(CV)　to　expose　more　Pt　active　sites　on　the　surface,　which　enhances　the　electrocatalytic　performance　greatly.　The　addition　of　Pd　as　another　sacrificing　element　triggers　higher　activity　due　to　the　synergistic　effect　between　Pd　and　Pt.　The　mass　activity　of　as-prepared　PtAg2/C-D　catalyst　reaches　3.35　times　as　high　as　that　of　Pt/C.　The　PtPd3Ag5/C-D　catalyst　has　the　highest　electrocatalytic　activity　of　4500　mA　mg(-1),　which　is　6.22　and　1.87　times　as　high　as　those　of　mono　component　Pt/C　and　Pd/C,　respectively.　Their　high　electrocatalytic　activity　is　attributed　to　electronic　effects,　oxygen-containing　species　from　Pd　oxides　and　higher　utilization　of　Pt.　(C)　2017　Elsevier　Ltd.　All　rights　reserved.