Spinel-based oxide cathode used for high temperature CO 2 /H 2 O co-electrolysis

Kuan Ting Wu, Tatsumi Ishihara

Research output: Contribution to journalArticle

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Abstract

Spinel oxides are applied as cathodes (fuel electrode) for the high temperature co-electrolysis of CO 2 /H 2 O mixtures. The spinel oxide is composed of two transition metals, which may improve activity for the reduction of CO 2 and H 2 O. A series of spinel oxides have been synthesized and tested in co-electrolysis mode. A good candidate, CuFe 2 O 4 , was found and achieved a current density higher than 1 A/cm 2 in CO 2 /H 2 O co-electrolysis with a fuel composition of 30%CO 2 /30%H 2 O-Ar at 800 °C, although the product was enriched in H 2 . This material presents superior Coulombic (Faradaic) efficiency for CO + H 2 gas products, reaching more than 95%. It shows stable and reversible I-V curves, indicating good electrochemical cell performance in the co-electrolysis operation. In addition, a uniform porous structure with fine particles was observed after co-electrolysis, which may be associated with the stable and reversible electrochemical cell performance observed.

Original languageEnglish
Pages (from-to)46-51
Number of pages6
JournalSolid State Ionics
Volume329
DOIs
Publication statusPublished - Jan 1 2019

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electrolysis
Carbon Monoxide
Electrolysis
Oxides
spinel
Cathodes
cathodes
oxides
Electrochemical cells
electrochemical cells
Temperature
products
Transition metals
Current density
Gases
transition metals
spinell
current density
Electrodes
electrodes

All Science Journal Classification (ASJC) codes

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

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Spinel-based oxide cathode used for high temperature CO 2 /H 2 O co-electrolysis . / Wu, Kuan Ting; Ishihara, Tatsumi.

In: Solid State Ionics, Vol. 329, 01.01.2019, p. 46-51.

Research output: Contribution to journalArticle

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abstract = "Spinel oxides are applied as cathodes (fuel electrode) for the high temperature co-electrolysis of CO 2 /H 2 O mixtures. The spinel oxide is composed of two transition metals, which may improve activity for the reduction of CO 2 and H 2 O. A series of spinel oxides have been synthesized and tested in co-electrolysis mode. A good candidate, CuFe 2 O 4 , was found and achieved a current density higher than 1 A/cm 2 in CO 2 /H 2 O co-electrolysis with a fuel composition of 30{\%}CO 2 /30{\%}H 2 O-Ar at 800 °C, although the product was enriched in H 2 . This material presents superior Coulombic (Faradaic) efficiency for CO + H 2 gas products, reaching more than 95{\%}. It shows stable and reversible I-V curves, indicating good electrochemical cell performance in the co-electrolysis operation. In addition, a uniform porous structure with fine particles was observed after co-electrolysis, which may be associated with the stable and reversible electrochemical cell performance observed.",
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N2 - Spinel oxides are applied as cathodes (fuel electrode) for the high temperature co-electrolysis of CO 2 /H 2 O mixtures. The spinel oxide is composed of two transition metals, which may improve activity for the reduction of CO 2 and H 2 O. A series of spinel oxides have been synthesized and tested in co-electrolysis mode. A good candidate, CuFe 2 O 4 , was found and achieved a current density higher than 1 A/cm 2 in CO 2 /H 2 O co-electrolysis with a fuel composition of 30%CO 2 /30%H 2 O-Ar at 800 °C, although the product was enriched in H 2 . This material presents superior Coulombic (Faradaic) efficiency for CO + H 2 gas products, reaching more than 95%. It shows stable and reversible I-V curves, indicating good electrochemical cell performance in the co-electrolysis operation. In addition, a uniform porous structure with fine particles was observed after co-electrolysis, which may be associated with the stable and reversible electrochemical cell performance observed.

AB - Spinel oxides are applied as cathodes (fuel electrode) for the high temperature co-electrolysis of CO 2 /H 2 O mixtures. The spinel oxide is composed of two transition metals, which may improve activity for the reduction of CO 2 and H 2 O. A series of spinel oxides have been synthesized and tested in co-electrolysis mode. A good candidate, CuFe 2 O 4 , was found and achieved a current density higher than 1 A/cm 2 in CO 2 /H 2 O co-electrolysis with a fuel composition of 30%CO 2 /30%H 2 O-Ar at 800 °C, although the product was enriched in H 2 . This material presents superior Coulombic (Faradaic) efficiency for CO + H 2 gas products, reaching more than 95%. It shows stable and reversible I-V curves, indicating good electrochemical cell performance in the co-electrolysis operation. In addition, a uniform porous structure with fine particles was observed after co-electrolysis, which may be associated with the stable and reversible electrochemical cell performance observed.

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