05-01-2017 дата публикации
Номер: US20170001172A1
The present teachings are directed to inorganic oxide materials that include AlO, CeO, and at least one of MgO and PrO. The present teachings are also directed to catalysts having at least one noble metal supported on these inorganic oxide materials, as well as methods for treating exhaust gases from internal combustion engines using such catalysts. 1. An inorganic oxide material , comprising:{'sub': 2', '3, '(a) from about 25 to about 90 pbw AlO;'}{'sub': '2', '(b) from about 5 to about 35 pbw CeO;'}(c)(i) from about 5 to about 35 pbw MgO, or{'sub': 6', '11, '(c)(ii) from about 2 to about 20 pbw PrO, or'}{'sub': 6', '11, '(c)(iii) from about 5 to about 35 pbw MgO, and from about 2 to about 20 pbw PrO; and'}(d) optionally up to about 10 pbw of a combined amount of oxides of one or more dopants selected from transition metals, rare earths, and mixtures thereof.2. The inorganic oxide material of claim 1 , wherein the material comprises from about 40 to about 80 pbw AlOand from about 10 to about 30 pbw CeO.3. (canceled)4. The inorganic oxide material of claim 1 , wherein the material comprises from about 10 to about 30 pbw MgO.5. The inorganic oxide material of claim 1 , wherein the material comprises from about 5 to about 15 pbw PrO.6. The inorganic oxide material of claim 1 , wherein the material comprises from about 10 to about 30 pbw MgO and from about 5 to about 15 pbw PrO.7. The inorganic oxide material of claim 1 , wherein the material comprises from about 1 to about 10 pbw of an oxide or a mixture of oxides selected from YO claim 1 , LaO claim 1 , NdOand GdO.8. The inorganic oxide material of claim 1 , wherein the material comprises from about 1 to about 4 pbw LaO.9. The inorganic oxide material of claim 1 , wherein the material comprises (a) crystallites comprising AlOand at least one oxide selected from MgO and PrO claim 1 , and (b) crystallites comprising CeO.11. The inorganic oxide material of claim 10 , wherein the material comprises from about 40 to about ...
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