화학공학소재연구정보센터
Inorganic Chemistry, Vol.56, No.19, 11876-11882, 2017
Correlation between Dissolved Protons in Nickel-Doped BaZr0.1Ce0.7Y0.1Yb0.1O3-delta and Its Electrical Conductive Properties
The electrical conductivity of nickel (2 wt %)-doped BaZr0.1,Ce0.7Y0.1Yb0.1 O3-delta (BZCYYb) acceptor-doped perovskite oxide was evaluated under air and a 1% H-2 atmosphere. The partial conductivity was calculated from the total conductivity and the transport number of each carrier (t(H+), t(o)(2-), and t(h)(+)) obtained using the concentration cell method. Its correlation with the dissolution state of the protons in the oxide as studied by in situ diffuse reflection Fourier transform infrared spectroscopy is discussed. When the concentration of protons that dissolved in BZCYYb-Ni was high, the proton partial conductivity was also high. An increase in hole conductivity in the high-temperature region in an air atmosphere was observed, suggesting that dissociation of protons strongly correlates with such a dominant carrier change. The dissociation of protons should be determined by the stability of protons in the oxide by the interaction with the lattice oxygen, and it was suggested that the dissolution state of protons can be controlled by modifying such stability in the oxide.