3. High-temperature electrolysis
The principle of a basic high-temperature electrolysis (EHT) cell is shown schematically in Figure 3 . This technology does not require a noble metal catalyst and uses rare earth elements, which are less expensive. Similar to low-temperature electrolysers, a high-temperature electrolysis cell consists of two electrodes and an electrolyte, which separates the electrodes and conducts oxide ions O 2– . The half-reactions occurring at the anode and cathode are given by the equations (9) and (10)
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High-temperature electrolysis
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