Catalysts for Electrochemical Water Splitting for Hydrogen Production

Straightforward electrochemical synthesis of a Co3O4 nanopetal/ZnO nanoplate p–n junction for photoelectrochemical water splitting

“…Also, the conduction band (CB) needs to be positioned negatively relative to the water reduction potential (H + /H 2 ; 0 V vs. NHE), while the valence band (VB) should be active in a more positive potential region compared to the water oxidation potential (O 2 /H 2 O; 1.23 V vs. NHE). [4][5][6] Also, the efficiency of photocatalytic water splitting, which converts solar energy into hydrogen, has remained relatively low. For instance, Zhou et al 7 conducted a study using InGaN/GaN nanowire semiconductors, which achieved one of the highest solar-to-hydrogen efficiencies of 9.2% when using pure water under a xenon lamp with an AM1.5G lter.…”