Low　loading　Pt　clusters　are　deposited　on　Ni2P　with　phosphorus　vacancy　which　is　coated　at　carbon　cloth　(Vp-Ni2PPt/CC).　And　Vp-Ni2P-Pt/CC　is　synthesized　as　efficient　bifunctional　electrocatalysts　for　hydrogen　evolution　reaction　(HER)　and　selective　methanol　oxidation　reaction　(MOR)　at　methanol-water　co-electrolysis.　The　loading　of　Pt　is　only　12.97　mu　g　cm-2,　and　the　synergistic　effect　with　the　substrate　material　Ni2P　enables　efficient　MOR　at　low　potential　(0.6　V　vs　RHE),　and　the　mass　activity　of　Pt　can　reach　9.16　A　mg-1Pt.　Compared　with　the　oxygen　evolution　reaction　(OER)　in　the　water　electrolysis,　the　MOR　potential　is　negatively　shifted　by　931　mV　during　coelectrolysis,　and　the　energy　consumption　of　hydrogen　production　is　saved　by　40-55%.　Moreover,　value-added　chemicals　formate　is　simultaneously　co-generated　while　without　CO2　emission.