This title appears in the Scientific Report :
2018
Please use the identifier:
http://dx.doi.org/10.1039/C8TA04019B in citations.
Efficient intermediate-temperature steam electrolysis with Y : SrZrO 3 –SrCeO 3 and Y : BaZrO 3 –BaCeO 3 proton conducting perovskites
Efficient intermediate-temperature steam electrolysis with Y : SrZrO 3 –SrCeO 3 and Y : BaZrO 3 –BaCeO 3 proton conducting perovskites
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...
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Personal Name(s): | Leonard, Kwati (Corresponding author) |
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Okuyama, Yuji / Takamura, Yasuhiro / Lee, Young-Sung / Miyazaki, Kuninori / Ivanova, Mariya / Meulenberg, Wilhelm Albert / Matsumoto, Hiroshige (Corresponding author) | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | Journal of materials chemistry / A, 6 (2018) S. 19113-19124 |
Imprint: |
London [u.a.]
RSC
2018
|
DOI: |
10.1039/C8TA04019B |
Document Type: |
Journal Article |
Research Program: |
Methods and Concepts for Material Development |
Publikationsportal JuSER |
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. |