ABSTRACT: Metal oxides are used in concentrated solar energy plants (CSP) to store heat, which can be used in the absence of the sun to generate electricity or produce solar fuels. Energy can be stored in this form for long periods, being released when necessary. Two step redox thermochemical cycles using metal oxides are a valuable solar energy storage option to produce H2 and CO. This brief review paper summarizes the role of metal oxide on the sustainable production of alternative fuels. It contemplates the formation of oxygen vacancies, combination of metals and the progress made to date on the utilization of metal oxides as promising materials with potential application in water splitting for production of clean hydrogen and solar fuels.info:eu-repo/semantics/publishedVersio
