電子移動メディエーターと分子触媒で修飾したシリコン(111)電極での光電気化学的水素発生および二酸化炭素還元 (Photoelectrochemical Hydrogen Evolution and CO2 Reduction Reactions at Si(111) Electrodes Modified By Molecular Layers with Viologen Moiety As an Electron Transfer Mediator and Metal Complex As a “Confined Molecular Catalyst”)