Effects of Trivalent Dopants on the Redox Properties of Ce0.6Zr0.4O2Mixed Oxide

Summary report : direct approaches for recycling carbon dioxide into synthetic fuel.

“…Ni/YDC catalysts have been reported to have higher activities for CO formation for dry reforming of methane if they are calcined at higher temperatures [56]. The introduction of Y, La and Ga along with zirconia to form ternary oxides has been reported to give improved results (lower reduction temperatures) over the binary ceria-zirconia solutions [57]. In contrast to these reports, sintering of a doped ceria electrode on an YSZ electrolyte at temperatures > 1200 ºC is reported to form a reaction zone with limited ionic conductivity.…”

Chemical Characterization and Catalytic Activity of Pd-Supported Catalysts on Ce0.39Zr0.61O x /SiO2

“…However, very little studies on SiO 2 as a support for Ce-Zr mixed oxide for methane oxidation has been reported. Vidmar et al [20] showed that Ce x Zr 1-x O 2 mixed oxide composition has an influence on OSC results, showing the best behavior at x = 0.4. In this research, the catalytic behavior of Pd supported on Ce 0.39 Zr 0.61 O x /SiO 2 was studied.…”

Autothermal Reforming of Methane Over CeO2–ZrO2–La2O3 Supported Rh Catalyst

“…It has been recognized by several authors that low-valent cations, especially the rare-earth metals, are good promoters for the ceria-zirconia system. Vidmar et al [11] reported that the addition of an appropriate trivalent cation favored the homogeneity of the cubic phases, which has been recognized as the most active phase due to its high OSC and good textural properties. Ce x Zr 1-x-y RE y O 2-y (RE = La, Pr, Nd, Y; x = 0.4-0.6; y = 0-0.16) solid solutions with good chemical homogeneity have been obtained by Si et al [12] via a urea hydrolysis-based hydrothermal method.…”

“…[9,11]. It has been recognized by several authors that low-valent cations, especially the rare-earth metals, are good promoters for the ceria-zirconia system.…”