What is the difference between photocatalytic total hydrolysis of water and conventional photolysis of water to produce hydrogen? What instruments do you usually use?

At present, the commonly studied hydrogen production by photolysis of water generally adds sacrificial agent to produce only hydrogen, while photocatalytic total hydrolysis refers to the simultaneous production of hydrogen and oxygen. At present, RTK photocatalytic total hydrolysis system is the most widely used system. The system adopts a new patented reactor and RTK GMC technology, which has an experimental environment at normal temperature and pressure, full coverage of extremely low to extremely high gas production, real-time automatic recording of measured data, and no GC multi-channel parallel experiments.