NREL's HydroGEN Photoreactor Platform Design and Characterization

Chase Aldridge, Ellis Klein, William Callahan, Keenan Wyatt, Todd Deutsch, James Young

Research output: NRELTechnical Report


This technical report details the design, fabrication, and construction of a flow-through photoreactor developed at The National Renewable Energy Laboratory (NREL). The photoreactor is designed to facilitate indoor or outdoor testing on photoelectrochemical or integrated solar water splitting devices. The photoreactor design described here is based on a previous demonstration. The photoreactor version described herein contains several advanced design features that include: 1) Chassis-chuck two-part design, 2) Separable counter electrode compartments (here, the counter electrodes are anodes), 3) Reduced electrode separation to reduce electrolyte resistance, 4) Improved flow pattern for bubble removal, 5) Mounting for spectroradiometer receptor, 6) Fresnel lens and collimating tube attachments. The photoreactor presented here was designed primarily to accommodate photocathode materials in an illuminated compartment and a dark anode as the oxygen evolution catalyst. The build materials were thus chosen to for acid electrolyte compatibility. Other embodiments could accommodate a photoanode with dark hydrogen evolution catalyst and other build materials for alkaline compatibility.
Original languageAmerican English
Number of pages19
StatePublished - 2021

NREL Publication Number

  • NREL/TP-5900-79644


  • photoreactor platform
  • solar water splitting devices


Dive into the research topics of 'NREL's HydroGEN Photoreactor Platform Design and Characterization'. Together they form a unique fingerprint.

Cite this