Heterogeneous environmental catalysis – a gentle art: CeO2–ZrO2 mixed oxides as a case history

Synthesis of CeO2–ZrO2 solid solution by glycothermal method and its oxygen release capacity

“…The shift of the reduction peak by repeated reduction-oxidation procedures has been reported by other researchers [35,39,[44][45][46][47]. However, reduction temperature depends on the temperature of re-oxidation [48].…”

Synergy between gold and oxygen vacancies in gold supported on Zr-doped ceria catalysts for the CO oxidation

“…Actually, the thermal stability and the modification of the textural properties have been closely related to the OSC promotion. Besides this, Di Monte et al [1] [13] suggested that the increase of CeO 2 content in Ce X Zr 1-X O 2 mixed oxides produces the increase of BET area and solids with a ceria content superior than that of Ce 0.4 Zr 0.6 O 2 may be are candidates for low to medium temperature catalytic applications, avoiding the phase segregation. On the other hand, Masui et al [14] presented the synthesis of Ce 0.5 Zr 0.5 O 2 employing different experimental procedures and the evolution of a cubic pyrochlore-type structure was detected in some cases.…”

“…CeO 2 -ZrO 2 mixed oxides has been widely studied because its application as three-way catalyst (TWC) promoters [1]. Apart from this use, materials based on these mixed systems have been reported in H 2 production from hydrocarbons [2], sulfur abatement in the fluid catalytic cracking (FCC) process [3], water gas shift reaction (WGS) [4], and as solid oxide fuel cell anodes [5].…”

Water splitting reaction on Ce0.15Zr0.85O2 driven by surface heterogeneity

“…5 It follows that studies on ceria-based systems have been focused on lowering the reduction temperature of the Ce 4+ /Ce 3+ redox couple, while maintaining the high reactivity of reduced Ce 3+ species towards water. 3,6 The addition of high valence dopant cations, such as Zr 4+ , proved effective in increasing the thermodynamic driving force of CeO2 reduction at lower temperatures, [7][8][9] and the effect of zirconium content in the two step water splitting reaction has been widely studied. [10][11][12][13][14] Its presence favours CeO2 reduction under inert atmosphere at temperatures lower than 1500°C preventing sublimation and the consequent yield loss; moreover, the increased oxygen storage of ceria-zirconia positively affects O2…”