YSZ-Based Oxygen Sensors and the Use of Nanomaterials: A Review from Classical Models to Current Trends
Figure 6
Representation of the diffusion of O2 and H2 across a porous layer covering one of the electrodes. According to Saji et al. [15], diffusion of the molecular species may lead to important differences between the bulk gas concentration and the measured concentration in the electrodes. This would justify differences in the step voltage in some gas mixtures.
