| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1273917 | International Journal of Hydrogen Energy | 2014 | 5 Pages |
•In-situ method for determination of H2 crossover for PEM water electrolyzers.•High accuracy measurement with simple and cheap setup.•H2 crossover is determined by means of a current compensation technique.•Mass flux measurement is translated into a current measurement.•Characterization technique employable especially for asymmetric pressure conditions.
An in-situ method for determination of hydrogen crossover in polymer electrolyte membrane (PEM) water electrolysis cells is discussed. The measurement principle is based on the electrochemical compensation of the crossover flux, which translates the mass flux determination into an electric current measurement. The proposed method features an extremely simple set-up and measurement procedure, as well as high accuracy. It allows for measurement with a fully assembled cell at normal water electrolysis conditions by use of standard equipment, also installed in industrial electrolyzer plants. The technique is especially suitable for high-pressure PEM electrolyzers operated under asymmetric pressure conditions. The applicability of the suggested method for a broad pressure range is briefly illustrated with a laboratory scale electrolyzer plant and by comparison of the measured data with available literature values.
