TY - JOUR
T1 - A water splitting model of Coulomb interactions of its dipole with surface defects of hydrogen implanted perovskite oxide
AU - Morita, K.
AU - Tsuchiya, B.
AU - Nagata, S.
AU - Katahira, K.
AU - Yoshino, M.
AU - Yuhara, J.
AU - Arita, Y.
AU - Ishijima, T.
AU - Sugai, H.
N1 - Funding Information:
This work was supported by the Industrial Technology Research Grant Program in 05A0002c from New Energy Development Organization (NEDO) of Japan. The first author is grateful for valuable co-operation of the Advanced Research Center of Metallic Glasses, Institute for Materials Research, Tohoku University.
PY - 2008/9/15
Y1 - 2008/9/15
N2 - The decay curve of deuterium atoms implanted and the uptake curve of hydrogen atoms in perovskite oxide ceramics by exposure to water vapor at room temperature have been measured by means of the ERD technique with MeV He ion beam. The decay and uptake curves have been phenomenologically analyzed, based on the one way diffusion model for the D-H replacement. The D-H replacement rates in SrCe0.95Yb0.05O3 - δ (bulk), BaCe0.95Y0.05O3 - δ (bulk), BaCe0.8Sm0.2O3 - δ/Ce0.8Sm0.2O2 - δ(thin film) and BaZr0.84Y0.16O3 - δ/8YSZ(thin film) are found to be 6.9 × 10- 4/s, 2.0 × 10- 2/s, 1.0 × 10- 1/s and 3.0 × 10- 3/s, respectively. The difference among them are discussed in terms of dipole induced water splitting model induced by Coulomb interactions of dipole charge of water molecule adsorbed at the surface with charges of the surface lattice defects, oxygen vacancy and doped trivalent impurity ions, which introduce donors and acceptors, respectively, thermally ionized at room temperature.
AB - The decay curve of deuterium atoms implanted and the uptake curve of hydrogen atoms in perovskite oxide ceramics by exposure to water vapor at room temperature have been measured by means of the ERD technique with MeV He ion beam. The decay and uptake curves have been phenomenologically analyzed, based on the one way diffusion model for the D-H replacement. The D-H replacement rates in SrCe0.95Yb0.05O3 - δ (bulk), BaCe0.95Y0.05O3 - δ (bulk), BaCe0.8Sm0.2O3 - δ/Ce0.8Sm0.2O2 - δ(thin film) and BaZr0.84Y0.16O3 - δ/8YSZ(thin film) are found to be 6.9 × 10- 4/s, 2.0 × 10- 2/s, 1.0 × 10- 1/s and 3.0 × 10- 3/s, respectively. The difference among them are discussed in terms of dipole induced water splitting model induced by Coulomb interactions of dipole charge of water molecule adsorbed at the surface with charges of the surface lattice defects, oxygen vacancy and doped trivalent impurity ions, which introduce donors and acceptors, respectively, thermally ionized at room temperature.
KW - D-H replacement
KW - Dipole-induced water splitting
KW - Hydrogen gas emission
KW - Ion beam analysis
KW - Oxide ceramics
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U2 - 10.1016/j.ssi.2008.02.036
DO - 10.1016/j.ssi.2008.02.036
M3 - Article
AN - SCOPUS:48449088991
VL - 179
SP - 793
EP - 796
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
IS - 21-26
ER -
