Ordered　intermetallic　PtSb　had　been　synthesized　by　arc-melted　and　then　sintering　treatment.　The　electro-oxidation　of　liquid　methanol　on　PtSb　was　investigated　at　room　temperature　by　cyclic　voltammetry　and　chronoamperometry.　The　results　are　compared　to　those　at　a　polycrystalline　platinum　electrode　surface.　It　was　found　that　PtSb　intermetallic　was　catalytically　more　active　than　pure　platinum　according　to　the　onset　potential　and　current　density.　X-ray　diffraction　(XRD)　and　XPS　technologies　had　been　used　to　investigate　the　crystal　structure　and　electron　effect.　(c)　2005　Elsevier　B.V.　All　rights　reserved.