A　composite　electrocatalyst　composed　by　prepared　Magneli　phase　Mo4O11　and　Pt-black　(Pt/Mo4O11)　was　found　with　highly　effective　for　the　methanol　oxidation　reaction　(MOR).　Cyclic　voltammetry　(CV)　result　showed　that　the　mass　activity　for　the　forward　peak　(I-f)　of　Pt/Mo4O11　was　determined　to　be　722.20　mA　mg(-1)　pt,　e.g.,　about　twice　of　the　mass　activity　of　the　stand-alone　Pt-black.　This　suggested　that　the　electrocatalytical　reactivity　is　improved　when　the　crystallised　Mo4O11　assists　for　methanol　oxidation.　It　is　also　found　that　the　peak　current　ratio　of　the　forward　versus　the　reverse　(l(f)/l(b))　is　1.21　for　Pt/Mo4O11　and　0.81　for　Pt/C,　respectively.　X-ray　photoelectron　spectroscopy　(XPS)　results　indicated　that　different　valence　states　of　molybdenum　coexist　in　Mo4O11;　this　promotes　both　hydrogen　spillover　and　oxygen　buffering　effects.　The　synergistic　effects　of　Pt　and　Mo4O11　on　the　electrochemical　properties　represent　a　critical　advantage　of　the　Pt/Mo4O11　catalyst　for　anti-poisoning　towards　the　intermediates　in　the　MOR.　(C)　2015　Elsevier　B.V.　All　rights　reserved.