The effects of Fe on the oxygen storage and release properties of model Pd–Rh/CeO2–Al2O3 three-way catalyst

Effects of CeO2-ZrO2 present in Pd/Al2O3 catalysts on the redox behavior of PdOx and their combustion activity

“…In addition to the influence of addition of Zr 4+ , the other translation metals have also an important effect on the performance of supported PdO catalysts. For example, Lambrou and Efstathiou [19] [20]. The synergism between Ce-Zr and PdO leading to a better activity and thermal stability in the methane combustion is observed.…”

Effects of Ni-Doping of Ceria-Based Materials on Their Micro-Structures and Dynamic Oxygen Storage and Release Behaviors

“…As reported by Momontov et al [3], cations produced by dopants will disturb the well-ordered structure of ceriazirconia. Recently, transition metals dopants, including Mn, Fe or Cu, have demonstrated their positive role in facilitating bulk oxygen diffusion in ceria-zirconia [4][5][6]. Besides the structural effects, transition metal oxides with variable valence states can also store and release oxygen in the same way as Ce 4?…”

“…/Ce 3? redox couples [5]. Since Ni is in the same group of periodic table as Mn, Fe and Cu, which has similar extranuclear electronic state, it is of potential interest to modify the ceria-zirconia by Ni.…”

Analysis of oxide and vanadate supports for catalytic hydrogen combustion: Kinetic and mechanistic investigations

“…Dissociative adsorption of O 2 over the vacancies has been observed using infrared spectroscopic studies. Lambrou et al 35 have detected the different oxygen species and their transition to different forms using infrared spectra. Initial dioxygen species was observed to transform to oxygen species over the vacant sites via the formation of intermediate superoxide and peroxide species.…”

“…Fe 2 O 3 has also been used for the various exhaust catalytic reactions [32][33][34] and the presence of Fe is reported to influence the catalytic activity of three-way catalysts. 35,36 There are relatively fewer reports on the use of vanadates as supports for catalytic materials. However, vanadates in principle can be good interactive supports owing to the redox couples formed by both V as well as the second metal.…”