Question: how do you mimicking photosynthesis?

Jennifer Rudd answered on 9 Mar 2015:

Plants have something called photosystem II which is a series of chromophores (molecules that absorb light) and catalysts (things that make reactions easier). However, plants are really complicated and they have developed over billions of years, so we can’t just make lots of plants in our labs and hope that they’ll make enough hydrogen to power a bus or something similar, plus they are very inefficient. So, we are taking the idea of what plants do and are using a variety of metals and organic ligands (made of carbon, hydrogen and oxygen) to make a device that you could hold in your hand or put in a factory to make the hydrogen by splitting up water.