Electrochemical hydrogen pumps using Ba doped LaYbO3 type proton conducting electrolyte

Abstract The electrochemical hydrogen pumping using Ba doped LaYbO 3 oxide (La 0.9 Ba 0.1 YbO 3− α , LBYb-91) was investigated in this work. It was found that LBYb-91 can conduct a large amount of protons as much as 100 mA cm −2 and the theoretical hydrogen evolution is actually occurred by the proton conduction. It was also found that LBYb-91 has high chemical stability against CO 2 and H 2 O, and showed a comparable cell performance to SrZr 0.9 Y 0.1 O 3−α (SZY-91) with porous palladium electrode. The present study demonstrated that LBYb-91 is a potential candidate electrolyte material for the electrochemical cell to separate hydrogen from the reformed natural gas.

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