Hydrogen　production　from　the　aqueous　phase　reforming　(APR)　of　methanol　is　promising　to　reduce　the　global　carbon　dioxide　emission,　but　it　is　still　a　great　challenge　for　hydrogen　production　with　high　catalytic　efficiency　at　low　reaction　temperature.　Here　we　report　that　Al2O3　supported　Ni3Sn1　intermetallic　compounds　nanoparticles　as　new　class　of　plasmonic　photocatalyst　and　enables　low　temperature　(150-190　degrees　C),　efficient　hydrogen　production　(277　mu　mol　g-1　min-1　)　and　low　CO　and　CH4　selectivity　(＜=　0.1　%)　through　APR　with　the　help　of　light　irradiation.　The　hydrogen　production　rate　of　Ni3Sn1/Al2O3　is　8　times　higher　than　that　of　conventional　noble　metal　3　wt%　Pt/　Al2O3　catalyst　under　the　same　optimized　reaction　conditions.　The　exceptional　photocatalytic　performance　for　hydrogen　production　can　be　attribute　to　higher　efficiency　of　＂hot　electron＂　transference　into　the　reactant　due　to　the　higher　energy　level　of　＂hot　electron＂　and　the　lower　energy　level　of　metal-reactant　adsorption　bond　induced　by　Sn　doping　in　Ni3Sn1　under　light　irradiation,　which　not　only　improve　the　reactivity　via　enhanced　methanol　dissociation　and　the　sequential　water-gas　shift　(WGS)　reaction,　but　also　suppressed　catalyst　poisoning　via　accelerated　CO2　desorption　over　the　Ni　sites.