Materials selection to afford water splitting practical applications obviously needs to start by screening for MOF compounds that exhibit excellent stability in aqueous solutions. To date some of the water stable MOF materials that have been investigated for hydrogen production purposes include zeolitic imidazolate frameworks (ZIFs), particularly hydrophobic ZIF-8 and ZIF-9, porphyrin based MOFs, and Zr based MOFs especially UiO-66 and functionalised UiO-66-NH2 Outstanding materials science and practical engineering challenges include enhancing the environmental, chemical and thermomechanical stabilitiesof MOF based materials towards robust energy harvesting apparatus, so as to warrant high efficiency and long term durability during extended service in a large scale industrial setting.