The invention relates to a catalytic module including a solid support and a stack including at least the following layers arranged in the following order, taking the solid support as a base: a first porous layer containing CeO.sub.2 and deposited by chemical vapour deposition, and a first catalytic layer containing at least one metal and/or at least one alloy of metals.

A diesel oxidation catalyst, comprising a washcoat comprising four layers, the washcoat being disposed on a substrate, wherein the washcoat comprises a first layer comprising a first platinum group metal supported on a first metal oxide support material, which first layer is disposed on the substrate; a second layer comprising a second platinum group metal supported on a second metal oxide support material, and comprising a fifth platinum group metal, which second layer is disposed on the first layer; a third layer comprising a third platinum group metal supported on a third metal oxide support material and comprising a zeolitic material comprising Fe and comprising a sixth platinum group metal; and a fourth layer comprising a fourth platinum group metal and a fourth metal oxide; wherein the substrate has a length, a front end and a rear end; wherein the first layer is disposed on the substrate on the entire length of the substrate, wherein the second layer is disposed on the first layer on the entire length of the substrate; wherein the third layer is at least partially disposed on the second layer on x % of the length of the substrate from the front end of the substrate; wherein the fourth layer is at least partially disposed on the second layer on y % of the length of the substrate from the rear end of the substrate; wherein x is in the range of from 30 to 70, y is in the range of from 30 to 70 and x+y is in the range of from 95 to 115.

A layered emission control device for an engine system is provided, including a plurality of catalytic layers, the catalytic layers optionally or additionally comprising sublayers, each sublayer having a distinct composition. Advantages of such a device include providing increased treatment rates of one or more engine exhaust gas species over a wide range of engine exhaust operating conditions, while reducing exhaust emissions, and reducing a size of the emissions control system.

A lean NOx trap (LNT) catalyst includes a plurality of carriers connected to each other in series, wherein each of the carriers is embedded with at least one of a first wash coat containing magnesium (Mg)-substituted alumina, ceria (CeO.sub.2), barium (Ba), and a precious metal, a second wash coat containing magnesium (Mg)-substituted alumina, ceria (CeO.sub.2), barium (Ba), a third wash coat containing magnesium (Mg)-substituted alumina, ceria (CeO.sub.2), and a fourth wash coat containing magnesium (Mg)-substituted alumina, ceria (CeO.sub.2), and a higher content of a precious metal than the first wash coat, a ratio of the magnesium-substituted alumina to ceria (CeO.sub.2) being lower than that of the third wash coat, wherein the third and first wash coats are disposed in a foremost carrier through which exhaust gas passes sequentially from a front portion of the foremost carrier.

A layered emission control device for an engine system is provided, including a plurality of catalytic layers, the catalytic layers optionally or additionally comprising sublayers, each sublayer having a distinct composition. Advantages of such a device include providing increased treatment rates of one or more engine exhaust gas species over a wide range of engine exhaust operating conditions, while reducing exhaust emissions, and reducing a size of the emissions control system.

A catalytic module, containing a solid support, and a stack including at least the following layers arranged in the following order, taking the solid support as a base: a first porous layer containing CeO.sub.2 and deposited by chemical vapour deposition, a first catalytic layer containing at least one metal and/or at least one alloy of metals selected from, for example, Pt, Pd, Rh.

Multi-zoned synergized-platinum group metals (SPGM) catalysts with significant catalytic capabilities are disclosed. The multi-zoned SPGM catalysts are produced according to catalyst configurations including OC layers of ultra-low PGM loadings, alone or in combination with a base metal oxide, which are deposited onto either mixtures of doped ZrO.sub.2 and oxygen storage materials (OSM) or OSM alone. Further, the multi-zoned SPGM catalysts further include zoned impregnation layers with PGM, alone or in combination with Ba loadings. Additionally, three-zoned SPGM catalysts are produced including front and back zone catalysts that include binary spinel oxide compositions. Conversion performance of the aged SPGM catalysts and an aged PGM-based OEM catalyst are tested employing TWC low perturbation isothermal oscillating, isothermal steady-state sweep, and light-off test methodologies. Test results confirm the SPGM catalysts including ultra-low PGM loadings and spinel-based ZPGM WC layer are capable of providing significant conversion performance that is comparable to high PGM-based OEM catalyst.

Polymeric film of a semi rigid nature and with low opacity that contributes to environmental detoxification through the inclusion of titanium dioxide particles. It features photocatalytic properties within the range of visible light. The film permits the coating of surfaces such as windows by adhering to them and is thus easily removable. Versions in which the film includes at least one layer with electrochromic properties have been developed. It is intended for the chemicals and construction sectors.

A lean NOx trap (LNT) catalyst includes a plurality of carriers connected to each other in series, wherein each of the carriers is embedded with at least one of a first wash coat containing magnesium (Mg)-substituted alumina, ceria (CeO.sub.2), barium (Ba), and a precious metal, a second wash coat containing magnesium (Mg)-substituted alumina, ceria (CeO.sub.2), barium (Ba), a third wash coat containing magnesium (Mg)-substituted alumina, ceria (CeO.sub.2), and a fourth wash coat containing magnesium (Mg)-substituted alumina, ceria (CeO.sub.2), and a higher content of a precious metal than the first wash coat, a ratio of the magnesium-substituted alumina to ceria (CeO.sub.2) being lower than that of the third wash coat, wherein the third and first wash coats are disposed in a foremost carrier through which exhaust gas passes sequentially from a front portion of the foremost carrier.

A catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end, an outlet end with an axial length L; a first catalytic region comprising a first palladium component; a second catalytic region comprising a second rhodium component; a third catalytic region comprising a third palladium component; wherein the first catalytic region is adjacent to the second catalytic region; and wherein the first palladium component and the second rhodium component have a weight ratio of from 3:1 to 19:1, based on element.