The　electrochemical　oxygen　reduction　at　PtBi　ordered　intermetallic　electrode　surface　has　been　investigated　using　cyclic　voltammetry　and　rotating　disk　electrode.　The　results　are　compared　to　those　at　a　polycrystalline　platinum　electrode　surface.　It　was　found　that　in　methanol　containing　electrolyte　solution　the　onset　potential　for　oxygen　reduction　at　PtBi　is　shifted　to　more　positive　potentials　and　the　PtBi　catalyst　has　about　4　times　higher　limiting　current　density　for　oxygen　reduction　than　Pt.　Thus　the　PtBi　electrode　exhibits　superior　properties　in　0.5　mol　center　dot　L-1　H2SO4　+　0.25　mol　center　dot　L-1　CH3OH　when　compared　to　polycrystalline　platinum　in　terms　of　oxygen　reduction　onset　potential　band　current　density.　In　ordered　intermetallic　PtBi,　the　Pt-Pt　bond　length　is　increased　to　0.432　nm.　This　expansion　makes　it　very　difficult　for　methanol　to　adsorb　on　the　PtBi　surface,　leading　the　PtBi　to　have　the　ability　of　resisting　methanol.　X-ray　photoelectron　spectroscopy　analysis　indicated　an　increased　d-electron　vacancy　of　the　Pt　in　PtBi.　Such　an　increase　of　5　d　vacancies　led　to　an　increased　2　pi　electron　donation　from　O-2　to　the　Pt,　resulting　in　an　increased　O-2　adsorption　and　a　weakened　O-O　bond.