Sr_0.92Y_0.08Ti_1−xNi_xO_3−δ (SYTN) having a perovskite structure was investigated as a direct internal steam methane reforming catalyst for use in solid oxide fuel cells. To analyze the effect of Ni-ion doping, 0, 3, and 5 mol% of Ni is doped at the B-site of Sr_0.92Y_0.08TiO_3−δ (SYT). On doping, each Ni²⁺ cation substitutes a Ti⁴⁺ cation in SYT to form an oxygen vacancy with two electron holes, thus acting as an oxygen-ion conductor. The number of oxygen vacancies increases with increase in Ni-ion doping. In particular, Sr_0.92Y_0.08Ti_0.95Ni_0.05O_3−δ (SYTN5) shows excellent catalytic activity for steam methane reforming, yielding CH₄ conversions of 0.80, 0.96, and 0.99 at 700, 800, and 900 °C, respectively, and H₂-to-CO ratios of 3.38, 3.32 and 3.24 at 700, 800, and 900 °C, respectively, which are very close to the theoretical values for the steam methane reforming and water gas shift reactions. The excellent electrochemical property and high oxygen-ion conductivity of the SYTN5 anode result in good cell performance.

研究了具有钙钛矿结构的Sr _0.92 Y _0.08 Ti _{1- x} Ni _x O _{3- δ} (SYTN) 作为用于固体氧化物燃料电池的直接内部蒸汽甲烷重整催化剂。为了分析 Ni 离子掺杂的影响，在 Sr _0.92 Y _0.08 TiO _{3- δ} (SYT)的 B 位掺杂 0、3 和 5 mol% 的 Ni 。在掺杂时，每个 Ni ²⁺阳离子取代SYT 中的 Ti ⁴⁺阳离子以形成具有两个电子空穴的氧空位，从而充当氧离子导体。氧空位的数量随着 Ni 离子掺杂的增加而增加。特别是 Sr _0.92Y _0.08 Ti _0.95 Ni _0.05 O _{3− δ} (SYTN5) 对蒸汽甲烷重整显示出优异的催化活性，在 700、800和 900 °C 下CH ₄转化率分别为0.80、0.96和 0.99，H ₂ -to -CO 比率在 700、800 和 900 °C 下分别为 3.38、3.32 和 3.24，非常接近蒸汽甲烷重整和水煤气变换反应的理论值。SYTN5阳极优异的电化学性能和高氧离子电导率导致良好的电池性能。