Heterogeneous photocatalysis gives access to many useful redox chemistries through light-assisted catalysis. In this contribution, I am going to give a general introduction to heterogeneous photocatalysis, share our current understanding of this phenomenon, and overview its existing applications. I will then take a close look at the reaction of water splitting and highlight the major challenges the community is facing here. In the second part of my talk, I will introduce you to our approach to tackling these challenges by using a combination of molecular and solid-state photocatalysts. I will give several examples of our recent work in which we attempt to wire small inorganic clusters to the surface of semiconducting supports.