TY  - JOUR
AU  - Leonard, Kwati
AU  - Okuyama, Yuji
AU  - Takamura, Yasuhiro
AU  - Lee, Young-Sung
AU  - Miyazaki, Kuninori
AU  - Ivanova, Mariya
AU  - Meulenberg, Wilhelm Albert
AU  - Matsumoto, Hiroshige
TI  - Efficient intermediate-temperature steam electrolysis with Y : SrZrO 3 –SrCeO 3 and Y : BaZrO 3 –BaCeO 3 proton conducting perovskites
JO  - Journal of materials chemistry / A
VL  - 6
SN  - 2050-7496
CY  - London [u.a.]
PB  - RSC
M1  - FZJ-2018-05608
SP  - 19113-19124
PY  - 2018
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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000448412000040
DO  - DOI:10.1039/C8TA04019B
UR  - https://juser.fz-juelich.de/record/852736
ER  -