New insights into the role of Pd-Ce interface for methane activation on monolithic supported Pd catalysts: A step forward the development of novel PGM Three-Way Catalysts for natural gas fueled engines

Active Components of Catalysts of Methane Conversion to Synthesis Gas: Brief Perspectives

“…Mixing of Pd into the ceria lattice provides a coordination environment for Pd δ+ species that enables facile alternation between Pd 0 /Pd 2+ /Pd 4+ oxidation states, therefore creating highly reducible sites ideal for methane activation. Results indicate that incorporated Pd 4+ ions in ceria provide higher catalytic activity for methane oxidation than large Pd particles or large palladium oxide particles. ,− …”

Oxidation of methane to methanol over Pd@Pt nanoparticles under mild conditions in water

“…Please do not adjust margins XPS analysis was performed on Pd@Pt anocatalyst (Figure S7). 59 % of surface Pt is Pt 0 (Pt4f ~ 70.8 eV) 61 and 39 % of surface Pd is Pd 0 (Pd 3d ~ 335.0 eV), 62,63 likely due to oxidation of both elements after synthesis. CO adsorption experiments were carried out on Pd, Pt and Pd@Pt catalysts using DRIFTS technique (Figure 3).…”

Pd/CeO2 Catalysts Prepared by Solvent-free Mechanochemical Route for Methane Abatement in Natural Gas Fueled Vehicles

“…5 Several approaches have been considered to reduce its ignition delay, including innovative design of the reactor setup for faster heating 28 and optimization of the Pd active phase for CH4 activation at lower temperature. 29,30 This is often accomplished by tuning the optimal amount of Pd x+ surface species (0≤x≤4) which are stabilized on the surface and subsurface region based on reaction conditions, surface dopants and support type. [31][32][33][34] We previously reported a novel solvent-free mechano-chemical route for the synthesis of highly active methane oxidation Pd/CeO2 catalysts starting from either metallic Pd nanopowders or Pd salts.…”

“…Currently, it accounts for the major contribution to CH 4 release in optimized aftertreatment systems since the stable nature of the CH 4 molecule (C–H bond energy = 439 kJ/mol) hinders its low temperature abatement . Several approaches have been considered to reduce its ignition delay, including innovative design of the reactor setup for faster heating and optimization of the Pd active phase for CH 4 activation at lower temperature. , This is often accomplished by tuning the optimal amount of Pd x + surface species (0 ≤ x ≤ 4) which are stabilized on the surface and subsurface region based on reaction conditions, surface dopants, and support type. − …”