Efficient intermediate-temperature steam electrolysis with Y:SrZrO3-SrCeO3 and Y:BaZrO3-BaCeO3 proton conducting perovskites

Kwati Leonard, Yuji Okuyama, Yasuhiro Takamura, Young Sung Lee, Kuninori Miyazaki, Mariya E. Ivanova, Wilhelm A. Meulenberg, Hiroshige Matsumoto

Research output: Contribution to journalArticle

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Abstract

Ceramic proton conductors have the potential to become important components in future clean and efficient energy technologies. In this manuscript, barium cerium yttrium zirconate (Ba(Zr0.5Ce0.4)8/9Y0.2O2.9) and strontium cerium yttrium zirconate (SrZr0.5Ce0.4Y0.1O2.95), proton conducting perovskites were employed as solid oxide electrolysis cell (SOEC) electrolytes for hydrogen production via intermediate temperature steam electrolysis at 550 and 600 °C. Cathode-supported button cells examined for a 12 μm Ba(Zr0.5Ce0.4)8/9Y0.2O2.9 electrolyte, with Ni-SrZr0.5Ce0.4Y0.1O2.95 as the H2-electrode, and porous Ba0.5La0.5CoO3 as the anode reached current densities of 0.2 and 0.5 A cm-2 with applied voltage of 1.45 V, at 550 and 600 °C, respectively. Moreover, a hydrogen evolution rate of 127 μmol cm-2 per minute was achieved at 0.5 A cm-2, translating to a current efficiency of 82%. In addition, excellent cell performance was obtained using SrZr0.5Ce0.4Y0.1O2.95 as an electrolyte. Current densities of 0.2 and 0.5 A cm-2 were obtained at 600 °C with applied voltages of 1.28 and 1.63 V, achieving faradaic current efficiencies of 88 and 85%. The NiO-SrZr0.5Ce0.4Y0.1O3-δ composite cathode was more favorable for the densification of the supported Ba(Zr0.5Ce0.4)8/9Y0.2O2.9 electrolyte during sintering and could be promising for use as a cathode substrate in proton-conducting SOECs.

Original languageEnglish
Pages (from-to)19113-19124
Number of pages12
JournalJournal of Materials Chemistry A
Volume6
Issue number39
DOIs
Publication statusPublished - Jan 1 2018

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Steam
Electrolysis
Electrolytes
Protons
Cerium
Yttrium
Cathodes
Current density
Regenerative fuel cells
Temperature
Strontium
Electric potential
Barium
Hydrogen production
Densification
Hydrogen
Anodes
Sintering
Electrodes
Composite materials

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Efficient intermediate-temperature steam electrolysis with Y:SrZrO3-SrCeO3 and Y:BaZrO3-BaCeO3 proton conducting perovskites. / Leonard, Kwati; Okuyama, Yuji; Takamura, Yasuhiro; Lee, Young Sung; Miyazaki, Kuninori; Ivanova, Mariya E.; Meulenberg, Wilhelm A.; Matsumoto, Hiroshige.

In: Journal of Materials Chemistry A, Vol. 6, No. 39, 01.01.2018, p. 19113-19124.

Research output: Contribution to journalArticle

Leonard, Kwati ; Okuyama, Yuji ; Takamura, Yasuhiro ; Lee, Young Sung ; Miyazaki, Kuninori ; Ivanova, Mariya E. ; Meulenberg, Wilhelm A. ; Matsumoto, Hiroshige. / Efficient intermediate-temperature steam electrolysis with Y:SrZrO3-SrCeO3 and Y:BaZrO3-BaCeO3 proton conducting perovskites. In: Journal of Materials Chemistry A. 2018 ; Vol. 6, No. 39. pp. 19113-19124.
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abstract = "Ceramic proton conductors have the potential to become important components in future clean and efficient energy technologies. In this manuscript, barium cerium yttrium zirconate (Ba(Zr0.5Ce0.4)8/9Y0.2O2.9) and strontium cerium yttrium zirconate (SrZr0.5Ce0.4Y0.1O2.95), proton conducting perovskites were employed as solid oxide electrolysis cell (SOEC) electrolytes for hydrogen production via intermediate temperature steam electrolysis at 550 and 600 °C. Cathode-supported button cells examined for a 12 μm Ba(Zr0.5Ce0.4)8/9Y0.2O2.9 electrolyte, with Ni-SrZr0.5Ce0.4Y0.1O2.95 as the H2-electrode, and porous Ba0.5La0.5CoO3 as the anode reached current densities of 0.2 and 0.5 A cm-2 with applied voltage of 1.45 V, at 550 and 600 °C, respectively. Moreover, a hydrogen evolution rate of 127 μmol cm-2 per minute was achieved at 0.5 A cm-2, translating to a current efficiency of 82{\%}. In addition, excellent cell performance was obtained using SrZr0.5Ce0.4Y0.1O2.95 as an electrolyte. Current densities of 0.2 and 0.5 A cm-2 were obtained at 600 °C with applied voltages of 1.28 and 1.63 V, achieving faradaic current efficiencies of 88 and 85{\%}. The NiO-SrZr0.5Ce0.4Y0.1O3-δ composite cathode was more favorable for the densification of the supported Ba(Zr0.5Ce0.4)8/9Y0.2O2.9 electrolyte during sintering and could be promising for use as a cathode substrate in proton-conducting SOECs.",
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T1 - Efficient intermediate-temperature steam electrolysis with Y:SrZrO3-SrCeO3 and Y:BaZrO3-BaCeO3 proton conducting perovskites

AU - Leonard, Kwati

AU - Okuyama, Yuji

AU - Takamura, Yasuhiro

AU - Lee, Young Sung

AU - Miyazaki, Kuninori

AU - Ivanova, Mariya E.

AU - Meulenberg, Wilhelm A.

AU - Matsumoto, Hiroshige

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N2 - Ceramic proton conductors have the potential to become important components in future clean and efficient energy technologies. In this manuscript, barium cerium yttrium zirconate (Ba(Zr0.5Ce0.4)8/9Y0.2O2.9) and strontium cerium yttrium zirconate (SrZr0.5Ce0.4Y0.1O2.95), proton conducting perovskites were employed as solid oxide electrolysis cell (SOEC) electrolytes for hydrogen production via intermediate temperature steam electrolysis at 550 and 600 °C. Cathode-supported button cells examined for a 12 μm Ba(Zr0.5Ce0.4)8/9Y0.2O2.9 electrolyte, with Ni-SrZr0.5Ce0.4Y0.1O2.95 as the H2-electrode, and porous Ba0.5La0.5CoO3 as the anode reached current densities of 0.2 and 0.5 A cm-2 with applied voltage of 1.45 V, at 550 and 600 °C, respectively. Moreover, a hydrogen evolution rate of 127 μmol cm-2 per minute was achieved at 0.5 A cm-2, translating to a current efficiency of 82%. In addition, excellent cell performance was obtained using SrZr0.5Ce0.4Y0.1O2.95 as an electrolyte. Current densities of 0.2 and 0.5 A cm-2 were obtained at 600 °C with applied voltages of 1.28 and 1.63 V, achieving faradaic current efficiencies of 88 and 85%. The NiO-SrZr0.5Ce0.4Y0.1O3-δ composite cathode was more favorable for the densification of the supported Ba(Zr0.5Ce0.4)8/9Y0.2O2.9 electrolyte during sintering and could be promising for use as a cathode substrate in proton-conducting SOECs.

AB - Ceramic proton conductors have the potential to become important components in future clean and efficient energy technologies. In this manuscript, barium cerium yttrium zirconate (Ba(Zr0.5Ce0.4)8/9Y0.2O2.9) and strontium cerium yttrium zirconate (SrZr0.5Ce0.4Y0.1O2.95), proton conducting perovskites were employed as solid oxide electrolysis cell (SOEC) electrolytes for hydrogen production via intermediate temperature steam electrolysis at 550 and 600 °C. Cathode-supported button cells examined for a 12 μm Ba(Zr0.5Ce0.4)8/9Y0.2O2.9 electrolyte, with Ni-SrZr0.5Ce0.4Y0.1O2.95 as the H2-electrode, and porous Ba0.5La0.5CoO3 as the anode reached current densities of 0.2 and 0.5 A cm-2 with applied voltage of 1.45 V, at 550 and 600 °C, respectively. Moreover, a hydrogen evolution rate of 127 μmol cm-2 per minute was achieved at 0.5 A cm-2, translating to a current efficiency of 82%. In addition, excellent cell performance was obtained using SrZr0.5Ce0.4Y0.1O2.95 as an electrolyte. Current densities of 0.2 and 0.5 A cm-2 were obtained at 600 °C with applied voltages of 1.28 and 1.63 V, achieving faradaic current efficiencies of 88 and 85%. The NiO-SrZr0.5Ce0.4Y0.1O3-δ composite cathode was more favorable for the densification of the supported Ba(Zr0.5Ce0.4)8/9Y0.2O2.9 electrolyte during sintering and could be promising for use as a cathode substrate in proton-conducting SOECs.

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