A　64-fold　improved　efficiency　of　solar-to-hydrogen　conversion　(SHC)　was　achieved　via　exposing　Au　nanoparticles　(NPs)　on　the　{001}　facets　of　anatase　TiO2　nanosheets.　The　SHC　follows　a　surface　plasmon　resonance-mediated　electron　injection　mechanism,　where　Au　NPs　can　not　only　harvest　visible　light　and　convert　them　to　free　energetic　electrons,　but　promote　the　SHC　by　increasing　the　electron-hole　pair　formation　rate　driven　by　the　electromagnetic　field　formed　nearby　the　semiconductor.