Enhanced Sulfur and Coking Tolerance of a Mixed Ion Conductor for SOFCs: BaZr <sub>0.1</sub> Ce <sub>0.7</sub> Y <sub>0.2–</sub> <i> <sub>x</sub> </i> Yb <i> <sub>x</sub> </i> O <sub>3–δ</sub>
Distribution of the number of citations over years.