Strain　engineering　has　been　a　powerful　strategy　to　finely　tune　the　catalytic　properties　of　materials.　We　report　a　tensile-strained　two-to-three　atomic-layer　Pt　on　intermetallic　Pt3Ga　(AL-Pt/Pt3Ga)　as　an　active　electrocatalyst　for　the　methanol　oxidation　reaction　(MOR).　Atomic-resolution　high-angle　annular　dark-field　scanning　transmission　electron　microscopy　characterization　showed　that　the　AL-Pt　possessed　a　3.2%　tensile　strain　along　the　[001]　direction　while　having　a　negligible　strain　along　the　[100]/[010]　direction.　For　MOR,　this　tensile-strained　AL-Pt　electrocatalyst　showed　obviously　higher　specific　activity　(7.195　mA　cm(-2))　and　mass　activity　(1.094　mA/mu　g(pt))　than　those　of　its　unstrained　counterpart　and　commercial　Pt/C　catalysts.　Density　functional　theory　calculations　demonstrated　that　the　tensile-strained　surface　was　more　energetically　favorable　for　MOR　than　the　unstrained　one,　and　the　stronger　binding　of　OH*　on　stretched　AL-Pt　enabled　the　easier　removal　of　CO*.