Photoelectrochemical H2 generation from water using a CoO x /GaN photoelectrode
KAUST DepartmentElectrical Engineering Program
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Embargo End Date2020-01-01
Permanent link to this recordhttp://hdl.handle.net/10754/656750
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AbstractWe report the fabrication of a GaN-based photoelectrode with CoO x as a cocatalyst for the photoelectrochemical H2 generation from water. We confirmed that the cocatalyst prevented the GaN photocorrosion partially during the water photoelectrolysis reaction and that it has a superior performance when it is deposited as particles instead of as a thin film. We demonstrated that the CoO x /GaN photoelectrode is capable of generating H2 at a quasi-stable rate for at least 20 h. Scanning and transmission electron microscopy analyses of the cocatalyst confirmed that the CoO x particles agglomerate in sparse polycrystalline clusters, which were formed mainly by spinel Co3O4.
SponsorsThis work was supported by the King Abdullah University of Science and Technology (KAUST) baseline funding BAS/1/ 1676-01-01 and start-up funding BAS/1/1676-01-08.