Current efficiency of electrochemical hydrogen pumping using a high-temperature proton conductor SrCe0.95Yb0.05O3-α

Hiroshige Matsumoto, Yosuke Iida, Hiroyasu Iwahara

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)345-349
Number of pages5
JournalSolid State Ionics
Volume127
Issue number3
DOIs
Publication statusPublished - Jan 2 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Current efficiency of electrochemical hydrogen pumping using a high-temperature proton conductor SrCe<sub>0.95</sub>Yb<sub>0.05</sub>O<sub>3-α</sub>'. Together they form a unique fingerprint.

Cite this