Solar Thermal Decoupled Electrolysis: Developing a Method for Reliably Quantifying Current Efficiency
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Department of Chemistry and Department of Mechanical Engineering
We are developing a reliable method for quantifying the current efficiency of the Valparaiso University solar electrolysis process for producing H2 from H2O. The current efficiency is based on a method of x-ray diffraction (XRD) quantitative analysis on solid products formed at the anode. Variables affecting the quality of current efficiency calculations were established experimentally. Ternary standards of cobalt species in varying mass percentages, similar to those expected from the electrolysis process, were analyzed and the results were compared to the known standard values. Critical variables include the following: (1) the method of quantification: Rietveld refinement or Relative Intensity; (2) the reference spectra used to identify species from the XRD pattern; (3) the drying temperature of electrolysis products. By investigating these variables, we have identified the method, reference data, and drying temperature for the analysis procedure.
Kotfer, Daniel; Prusinski, William; and Grade, Joshua, "Solar Thermal Decoupled Electrolysis: Developing a Method for Reliably Quantifying Current Efficiency" (2015). Fall Interdisciplinary Research Symposium. Paper 49.
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