6.5.3 Recent developments in materials for potentiometric sensors

Stability improvement of layered Au,Pt-YSZ mixed-potential gas sensing electrodes by cathodic polarization: Studies by steady state and dynamic electrochemical methods

“…In latest investigations of this type of sensors, the AuPt-mixtures admixed with YSZ fine powder were noted to be a promising mixed-potential electrode material. By using this electrode material combination, different mixed potential sensors were reported with satisfying sensing behaviors using various electrode designs [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. Especially the sensing responses of a Au,Pt|YSZ layered mixed-potential gas sensing electrode (APE) were found to be strongly related to the catalytic properties of the electrode material, which were found to be clearly influenced by the Au/Pt ratio and the Au-distribution on Pt over the electrode layer [26,[39][40][41].…”