Non-Arrhenius thermal dependence of surface conductance has previously been observed in the transition-metal oxides TiO₂ and MoO₃. Through the application of thermochemical modeling, kinetic modeling, and analysis of equivalent resistance networks, it is shown that a dual-charge-carrier model in which the adsorbate surface coverage is modulated by bi-Langmuir adsorption is better able to capture the thermal dependence of surface conductance in these materials than a model based on the hypothesis that conductance is governed by bottlenecks to charge hopping between grains. Adsorption energies predicted by the dual-charge-carrier model are in agreement with estimates of the same from published first-principles calculations. Particle-size dependence of the conductance likely arises from the increasing importance of surface processes to charge transport with decreasing particle size, not from an increase in the number of inter-particle contacts.

先前已经在过渡金属氧化物TiO ₂和MoO _3中观察到了非阿累尼乌斯表面传导的热依赖性。通过热化学建模，动力学建模和等效电阻网络分析的应用，表明双电荷载流子模型能够更好地捕捉双酚A的热依赖性，在该模型中，双朗缪尔吸附作用可调节被吸附物的表面覆盖率。这些材料的表面电导率比基于电导率受晶粒间电荷跳跃的瓶颈支配的模型所基于。双电荷载流子模型预测的吸附能与已发表的第一性原理计算的吸附能一致。电导的颗粒大小依赖性可能是由于表面过程对电荷传输的重要性随着颗粒大小的减小而增加，而不是由于颗粒间接触的数量增加。