In this work we present results of studies of In³⁺ doping in strontium cerate, comprising structural aspects, and oxygen as well as proton conductivity. Crystal structure analysis of single-phase SrCe_1-xIn_xO_3-a (x = 0.1, 0.2 and 0.3) materials in 25–900 °C temperature range indicates presence of strong orthorhombic distortion of the perovskite-type structure, similar as for the undoped SrCeO₃. Limited sinterability of the obtained powders was mitigated by addition of 1 wt% of NiO, which allowed to manufacture dense sinters at 1400 °C. Electrochemical impedance spectroscopy measurements done in dry synthetic air show decrease of the ionic (oxygen) conductivity with the increase of In content, as well as associated increase of the activation energy. This indicates that formed oxygen vacancies are trapped in the structure. Overall, electrical conductivity for SrCe_1-xIn_xO_3-a in H₂O- and D₂O-containing atmospheres decreases with In content, but respective H⁺ and D⁺ transference numbers are larger for samples with higher indium doping. At 500 °C the highest proton and deuterium conductivity was recorded for SrCe_0.9In_0.1O_3-a, reaching up to 0.70·10⁻⁴ S cm⁻¹ and 0.26·10⁻⁴ S cm⁻¹, respectively. Derived diffusion and surface exchange coefficients are 10⁻⁷-10⁻⁶ cm² s⁻¹ and 10⁻⁶-10⁻⁵ cm s⁻¹, respectively in 500–700 °C temperature range.

在这项工作中，我们介绍了在^铈酸锶中In ³⁺掺杂的研究结果，包括结构方面，氧以及质子传导率。在25–900°C的温度范围内，单相SrCe _1-x In _x O _3-a（x = 0.1、0.2和0.3）材料的晶体结构分析表明，钙钛矿型结构存在强烈的正交畸变，类似于用于未掺杂的SrCeO ₃。通过添加1wt％的NiO来减轻获得的粉末的有限的可烧结性，这允许在1400℃下制造致密的烧结体。在干燥的合成空气中进行的电化学阻抗谱测量表明，随着In含量的增加，离子（氧）电导率也随之降低，并且活化能也随之升高。这表明形成的氧空位被困在结构中。总体而言，在含H ₂ O和D ₂ O的气氛中，SrCe _1-x In _x O _3-a的电导率随In含量而降低，但H ⁺和D ^+分别铟掺杂较高的样品的迁移数较大。在500°C下，SrCe _0.9 In _0.1 O _3-a的最高质子和氘电导率最高，分别达到0.70·10 ^-4  S cm ^-1和0.26·10 ^-4  S cm ^-1。在500–700°C温度范围内，得出的扩散系数和表面交换系数分别为10 ^-7 -10 ^-6  cm ²  s ^-1和10 ^-6 -10 ^-5  cm s ^-1。