Water-Gas Shift over Pt Nanoparticles Dispersed on CeO and Gadolinium-Doped Ceria (GDC) Supports with Specific Nano-Configurations.

The water-gas shift (WGS) reaction is one of the most significant reactions in hydrogen technology since it can be used directly to produce hydrogen from the reaction of CO and water; it is also a side reaction taking place in the hydrocarbon reforming processes, determining their selectivity towards H production. The development of highly active WGS catalysts, especially at temperatures below ~450 °C, where the reaction is thermodynamically favored but kinetically limited, remains a challenge. From a fundamental point of view, the reaction mechanism is still unclear.

Methane Catalytic Combustion under Lean Conditions over Pristine and Ir-Loaded LaSrMnO Perovskites: Efficiency, Hysteresis, and Time-on-Stream and Thermal Aging Stabilities.

The increasing use of natural gas as an efficient, reliable, affordable, and cleaner energy source, compared with other fossil fuels, has brought the catalytic CH complete oxidation reaction into the spotlight as a simple and economic way to control the amount of unconverted methane escaping into the atmosphere. CH emissions are a major contributor to the 'greenhouse effect', and therefore, they need to be effectively reduced. Catalytic CH oxidation is a promising method that can be used for this purpose.

Activity and Thermal Aging Stability of LaSrMnO (x = 0.0, 0.3, 0.5, 0.7) and Ir/LaSrMnO Catalysts for CO Oxidation with Excess O.

The catalytic oxidation of CO is probably the most investigated reaction in the literature, for decades, because of its extended environmental and fundamental importance. In this paper, the oxidation of CO on LaSrMnO perovskites (LSMx), either unloaded or loaded with dispersed Ir nanoparticles (Ir/LSMx), was studied in the temperature range 100-450 °C under excess O conditions (1% CO + 5% O). The perovskites, of the type LaSrMnO (x = 0.

Support Induced Effects on the Ir Nanoparticles Activity, Selectivity and Stability Performance under CO Reforming of Methane.

The production of syngas (H and CO)-a key building block for the manufacture of liquid energy carriers, ammonia and hydrogen-through the dry (CO2-) reforming of methane (DRM) continues to gain attention in heterogeneous catalysis, renewable energy technologies and sustainable economy. Here we report on the effects of the metal oxide support (γ-AlO, alumina-ceria-zirconia (ACZ) and ceria-zirconia (CZ)) on the low-temperature (ca. 500-750 ∘C) DRM activity, selectivity, resistance against carbon deposition and iridium nanoparticles sintering under oxidative thermal aging.