TY - JOUR
T1 - Current efficiency of electrochemical hydrogen pumping using a high-temperature proton conductor SrCe0.95Yb0.05O3-α
AU - Matsumoto, Hiroshige
AU - Iida, Yosuke
AU - Iwahara, Hiroyasu
N1 - Funding Information:
This study was partially supported by Grant-in-Aid for Science and Research from The Ministry of Education, Science, Sports and Culture, Japan.
PY - 2000/1/2
Y1 - 2000/1/2
N2 - Current efficiency of electrochemical hydrogen pumping from wet hydrogen gas through a SrCe0.95Yb0.05O3-α proton-conducting solid electrolyte was investigated at 900 °C. A decrease in current efficiency was observed at relatively high current density. The critical current density for the reduction of the efficiency decreased with increasing amount of water vapor in the anode hydrogen gas. Addition of a small amount of argon to the anode gas had no effect on the pumping characteristics. It was concluded that the lack of hydrogen and the increase in partial pressure of oxygen at the anode on sending high current could cause the partial hole conduction in the electrolyte and the decrease in current efficiency of the hydrogen pump.
AB - Current efficiency of electrochemical hydrogen pumping from wet hydrogen gas through a SrCe0.95Yb0.05O3-α proton-conducting solid electrolyte was investigated at 900 °C. A decrease in current efficiency was observed at relatively high current density. The critical current density for the reduction of the efficiency decreased with increasing amount of water vapor in the anode hydrogen gas. Addition of a small amount of argon to the anode gas had no effect on the pumping characteristics. It was concluded that the lack of hydrogen and the increase in partial pressure of oxygen at the anode on sending high current could cause the partial hole conduction in the electrolyte and the decrease in current efficiency of the hydrogen pump.
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U2 - 10.1016/S0167-2738(99)00294-5
DO - 10.1016/S0167-2738(99)00294-5
M3 - Article
AN - SCOPUS:0033892721
SN - 0167-2738
VL - 127
SP - 345
EP - 349
JO - Solid State Ionics
JF - Solid State Ionics
IS - 3
ER -