Durability Testing of Photoelectrochemical Hydrogen Production under Day/Night Light Cycled Conditions

PHOTOELECTROCHEMICAL PRODUCTION of HYDROGEN

In this year’s Phase II photoelectrochemical hydrogen production research at the University of Hawaii, we have continued our emphasis on developing high-performance multi-junction hydrogen photoelectrodes based on low cost semiconductor and catalyst films. Significant progress was made in the advancement of amorphous silicon/germanium and copper indium gallium diselenide materials for solid-sta...

Photoelectrochemical Hydrogen Production

At the University of Hawaii (UH), the approach to developing high-efficiency, low-cost photoelectrochemical (PEC) processes for the direct production of hydrogen has included the use of integrated electrochemical/optical models to design photoelectrodes based on multijunction thin-film technology; materials research to identify critical issues on photoelectrode efficiency and stability; and the...

Photoelectrochemical Systems for Hydrogen Production

Two important research areas that are part of NREL’s effort towards a photoelectrochemicalbased (PEC) direct water splitting system include surface modification to improve system energetics and triple junction amorphous silicon structures (α-Si) as a low-cost thin-film water spitting system. In the area of surface modification, p-GaInP2 surfaces were tailored by adsorption of metallated porphyr...

Silicon Nanowire Photocathodes for Photoelectrochemical Hydrogen Production

The performance of silicon for water oxidation and hydrogen production can be improved by exploiting the antireflective properties of nanostructured silicon substrates. In this work, silicon nanowires were fabricated by metal-assisted electroless etching of silicon. An enhanced photocurrent density of -17 mA/cm² was observed for the silicon nanowires coated with an iron sulphur carbonyl catalys...

Characterization of iron oxide thin films for photoelectrochemical hydrogen production