Study of carbon dioxide electrolysis at electrode/electrolyte interface: Part II. Pt-YSZ cermet/YSZ interface

G. Tao, K. R. Sridhar, C. L. Chan

Research output: Contribution to journalConference articlepeer-review

60 Scopus citations

Abstract

CO2 electrolysis to produce O2 has been investigated by means of solid oxide electrolysis (SOE) in preparation for future human exploration of Mars. In order to increase the cell efficiency, a new cermet electrode mixture of Pt and YSZ was studied. SOE cells constructed from the Pt-YSZ cermet electrodes have been tested in a temperature range from 1023 to 1123 K. Comparisons of CO2 electrolysis performances have been conducted between cells using Pt-YSZ cermet electrodes and Pt electrodes. Characteristics investigated include current-voltage performance, ohmic resistances and activation overpotentials. The results demonstrate that the current density is nearly tripled and the performance improvement made by Pt-YSZ cermet electrodes is more significant at low temperature. Both the ohmic resistance and activation overpotential at the anode decrease significantly for the Pt-YSZ cermet electrodes. It suggests that the contact resistance and the electrode delamination are greatly reduced. However, change to the Pt-YSZ cermet electrodes does not have a profound influence on the cathode.

Original languageEnglish (US)
Pages (from-to)621-624
Number of pages4
JournalSolid State Ionics
Volume175
Issue number1-4
DOIs
StatePublished - Nov 30 2004
EventFourteenth International Conference on Solid State Ionics - Monterey, CA., United States
Duration: Jun 22 2003Jun 27 2003

Keywords

  • Activation overpotential
  • Carbon dioxide
  • Electrochemical reaction
  • Pt-YSZ cermet electrode
  • Solid oxide electrolysis

ASJC Scopus subject areas

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

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