Efficiency and Stability Best-Practices Proposed for Solar Water-Splitting To Make HydrogenNREL, Berkeley Lab
NREL, Berkeley Lab Offer Ideal Methods To Provide Confidence in Comparing Measurements
The publication provides a road map for the PEC community as researchers continue to refine the technology. These best practices were verified by both laboratories via round-robin testing using the same testing hardware, PEC photoelectrodes, and measurement procedures. Research into photovoltaics has allowed a certification of cell efficiencies, but PEC water-splitting efficiency measurements do not yet have a widely accepted protocol.
Other co-authors from Berkeley Lab are Olivia Alley, Guiji Liu, Tobias Kistler, David Larson, and Jason Cooper. The U.S. Department of Energy’s Hydrogen and Fuel Cell Technologies Office has set 25% as the ultimate target for STH through PEC, although preliminary cost analysis suggests that competitively costed hydrogen could be achieved with lower efficiencies. Photoelectrodes have demonstrated efficiencies from 10% to 20%.
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