▎ 摘　　要

NOVELTY - Unbiased photoelectrochemical hydrogen production system based on indium gallium nitride nanocolumn photoelectrodes on graphene comprises light anode, light cathode, electrolyte, light source and electrolytic cell. The light anode structure from bottom to top in turn is a substrate. The graphene is on the substrate. The indium-gallium nitride nano-column is grown on the graphene. The light cathode structure from up to down in turn is a substrate. The indium-gallium nitride nano-column is grown on the substrate. The light anode is connected with the light cathode through the lead. The electrolyte is placed in the electrolytic cell. The light source is used for simulating the solar light irradiation light electrode to prepare the hydrogen. USE - Used as unbiased photoelectrochemical hydrogen production system based on indium gallium nitride nanocolumn photoelectrodes on graphene comprises. ADVANTAGE - The system uses graphene, which not only widens the selection range of the substrate, but also can be used as conductive electrode, reduces the cost, graphene can form a Schottky barrier with the nano-column, is good for separating photo-generated carrier, enhancing carrier transport performance, greatly improving the photoelectric performance of the nano-column. At the same time, the light transmittance of the graphene can prepare indium gallium nitride nano-column integrated light electrode, which can widen the spectrum absorption, improve the water decomposition needed optical voltage, and realize non-bias photoelectric water decomposition to generate hydrogen. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the unbiased photoelectrochemical hydrogen production system based on indium gallium nitride nanocolumn photoelectrodes on graphene comprises.