Surface oxygen exchange kinetics and diffusion in La_2–xCa_xNiO_4+δ (x = 0; 0.1; 0.3) have been studied by the isotope exchange method with gas phase equilibration in the temperature range of 600–800 °C and oxygen pressure range 0.13–2.5 kPa. Despite an enhanced electrical conductivity of La_2–xCa_xNiO_4+δ theirs oxygen surface exchange (k*) and oxygen tracer diffusion (D*) coefficients were significantly lower in comparison with La₂NiO_4+δ. The rates of the elementary stages of oxygen exchange have been calculated. Upon Ca doping the change of the rate-determining stage was observed. The surface of the oxides was found to be inhomogeneous towards oxygen exchange process according to the recently developed model. The reasons of such inhomogeneity are discussed as well as Ca influence on the surface defect chemistry and oxygen surface exchange and diffusivity.

 通过同位素交换法研究了La _{2– x} Ca _x NiO _{4 +δ}（x = 0; 0.1; 0.3）中的表面氧交换动力学和扩散，并在600–800°C的温度范围内采用了气相平衡压力范围0.13–2.5 kPa。尽管拉的增强电导率_{2- X}的Ca _X的NiO _{4 +δ}他们的氧的表面交换（K *）和氧示踪物扩散（d *）系数与比较来显著降低的La ₂的NiO _{4 +δ}。已经计算出氧气交换的基本阶段的速率。在Ca掺杂后，观察到速率确定阶段的变化。根据最近开发的模型，发现氧化物的表面在氧交换过程中是不均匀的。讨论了这种不均匀性的原因，以及钙对表面缺陷化学和氧表面交换与扩散性的影响。