Electrochemistry of Doped Materials

FIGURE 6.10 (See color insert following page 94.) Field emission scanning electron micro-0.925O2 solid solution 

The appearance of common peaks for tetragonal and monoclinic vanadium-doped zirconias suggests that identical electrochemical pathways are operative for vanadium centers in these materials. Additional peaks recorded in t-V ZrOj materials can be attributed, however, to vanadium centers with a coordinative arrangement characteristic of tetragonal zirconias. 

Interestingly, electrochemical data can provide information on the oxidation state of doping centers, as described for high oxidation states of chromium in chromium-doped cassiterite (SnOj) and tin-sphene (or malayaite, CaSnSiOj Domenech et al., 2006c). 

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