Deactivation of Pd/Ce0.5Zr0.5O2 model three-way catalyst by P, Ca and Zn deposition

Effect of rare earth (La, Nd, Pr, Sm and Y) on the performance of Pd/Ce0.67Zr0.33MO2−δ three-way catalysts

“…After aging treatment, the OSCC of the samples decrease obviously due to sintering of the sample. This result is in good agreement with that reported by Efstathiou et al [43]. Nevertheless, the OSCC of the doped samples is also higher than that of aged CZ and the aged CZP sample exhibits the highest value at 300 8C (346.0 mmol/g).…”

“…The surface composition and atomic ratios obtained by XPS are listed in Table 3. Recently, Efstathiou et al [43] have reported the XPS studies on Pd/ Ce 0.5 Zr 0.5 O 2 . The surface of the Pd/Ce 0.5 Zr 0.5 O 2 catalyst is found to be enriched with cerium to a small extent, since the experimental Ce/Zr surface ratio of 1.277 obtained is slightly higher than the nominal one (Ce/Zr = 1.0).…”

Catalytic Oxidation of Methane: Pd and Beyond

“…Water vapor, sulfur oxides and phosphorus compounds are the main poisoning agents of Pd‐based catalysts under the conditions encountered in exhaust after‐treatment technologies and power generation . A complete discussion of the mechanisms of deactivation induced by these compounds is out of the scope of this work, but extensive reviews can be found in the literature , . Here, we highlight our contribution to the field, together with recent developments and existing challenges to improve catalyst stability.…”

In-Service Oxidation and Microstructural Evolution of a Nickel Superalloy in a Formula 1 Car Exhaust

“…Many of these likely originate from engine lubricants passing through to the engine fuel side; zinc dialkyldithiophosphate (ZDDP) is a common additive, which could account for the high levels of Zn and P co-located in the oxide. If this contamination affected a road vehicle, poisoning of the catalytic converter could occur [28,29], leading to increased emissions. K and Ca are also used in engine additives, with the levels present in exhaust particulates correlated to engine load conditions [30,31].…”