MOF-801 is constructed by Zr6O4(OH)4 and fumarate as the metal cluster and ligand, respectively. It has a similar topology compared with UiO-66 and was firstly reported in 2012 where both ZrCl4 and fumaric acid were reacted in a solvothermal condition with the presence of formic acid as the modulator. This is particularly driven by its promising application as a water harvester which utilises the surrounding humidity to produce fresh water and as an adsorbent for cooling system.