Oxidation catalyst for hydrocarbons produced by an internal combustion engine

An oxidation catalyst for treating hydrocarbons in an exhaust gas produced by an internal combustion engine, wherein the oxidation catalyst comprises a first region disposed on a substrate, wherein the first region comprises ruthenium (Ru) supported on a first support material comprising a refractory oxide,

• wherein the first region further comprises a noble metal (NM) supported on a second support material, wherein the noble metal is selected from the group consisting of platinum (Pt), palladium (Pd), a combination or a mixture of platinum (Pt) and palladium (Pd), and a combination or a mixture of palladium (Pd) and gold (Au), and
• the oxidation catalyst further comprises a second region, wherein the second region comprises the noble metal supported on a second support material, and
• wherein the second region is a second layer and the first region is a first zone, and wherein the first zone is disposed on the second layer at or near an outlet end of the substrate.

An oxidation catalyst for treating hydrocarbons in an exhaust gas produced by an internal combustion engine, wherein the oxidation catalyst comprises a first region disposed on a substrate, wherein the first region comprises ruthenium (Ru) supported on a first support material comprising a refractory oxide,

• wherein the first region further comprises a noble metal (NM) supported on a second support material, wherein the noble metal is selected from the group consisting of platinum (Pt), palladium (Pd), a combination or a mixture of platinum (Pt) and palladium (Pd), and a combination or a mixture of palladium (Pd) and gold (Au), and
• the oxidation catalyst further comprises a second region, wherein the second region comprises the noble metal supported on a second support material, and
• wherein the second region is a second layer and the first region is a first layer, and wherein the second layer is disposed on the first layer.

An oxidation catalyst for treating hydrocarbons in an exhaust gas produced by an internal combustion engine, wherein the oxidation catalyst comprises a first region disposed on a substrate, wherein the first region comprises ruthenium (Ru) supported on a first support material comprising a refractory oxide,

• wherein the first region further comprises a noble metal (NM) supported on a second support material, wherein the noble metal is selected from the group consisting of platinum (Pt), palladium (Pd), a combination or a mixture of platinum (Pt) and palladium (Pd), and a combination or a mixture of palladium (Pd) and gold (Au), and
• the oxidation catalyst further comprises a second region, wherein the second region comprises the noble metal supported on a second support material, and
• wherein the second region is a second zone disposed at or near an outlet end of the substrate and the first region is a first zone disposed at or near an inlet end of the substrate.

An oxidation catalyst for treating hydrocarbons in an exhaust gas produced by an internal combustion engine, wherein the oxidation catalyst comprises a first region disposed on a substrate, wherein the first region comprises ruthenium (Ru) supported on a first support material comprising a refractory oxide,

• wherein the first region further comprises a noble metal (NM) supported on a second support material, wherein the noble metal is selected from the group consisting of platinum (Pt), palladium (Pd), a combination or a mixture of platinum (Pt) and palladium (Pd), and a combination or a mixture of palladium (Pd) and gold (Au), and
• the oxidation catalyst further comprises a second region, wherein the second region comprises the noble metal supported on a second support material, and
• wherein the first region is a first layer and the second region is a second zone, and wherein the second zone is disposed on the first layer at or near an outlet end of the substrate.

An oxidation catalyst for treating hydrocarbons in an exhaust gas produced by an internal combustion engine, wherein the oxidation catalyst comprises a first region disposed on a substrate, wherein the first region comprises ruthenium (Ru) supported on a first support material comprising a refractory oxide,

• wherein the first region further comprises a noble metal (NM) supported on a second support material, wherein the noble metal is selected from the group consisting of platinum (Pt), palladium (Pd), a combination or a mixture of platinum (Pt) and palladium (Pd), and a combination or a mixture of palladium (Pd) and gold (Au), and
• the oxidation catalyst further comprises a second region, wherein the second region comprises the noble metal supported on a second support material, and
• wherein the first region is a first layer and the second region is a second layer, and wherein the first layer is disposed on the second layer.