A catalyst composition is provided comprising a homogeneous solid mixture having ordered directionally aligned tubular meso-channel pores having an average diameter in a range of about 1 nanometer to about 15 nanometers, wherein the homogeneous solid mixture is prepared from a gel formed in the pres
A catalyst composition is provided comprising a homogeneous solid mixture having ordered directionally aligned tubular meso-channel pores having an average diameter in a range of about 1 nanometer to about 15 nanometers, wherein the homogeneous solid mixture is prepared from a gel formed in the presence of a solvent, modifier, an inorganic salt precursor of a catalytic metal, an inorganic precursor of a metal inorganic network, and a templating agent. The templating agent comprises an octylphenol ethoxylate having a structure I: wherein “n” is an integer having a value of about 8 to 20.
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1. A catalyst composition that converts nitrogen oxides in exhaust streams generated by combustion of fossil fuels, comprising: a homogeneous solid mixture having ordered directionally aligned tubular meso-channel pores having an average diameter in a range of about 1 nanometer to about 15 nanometer
1. A catalyst composition that converts nitrogen oxides in exhaust streams generated by combustion of fossil fuels, comprising: a homogeneous solid mixture having ordered directionally aligned tubular meso-channel pores having an average diameter in a range of about 1 nanometer to about 15 nanometers, wherein the homogeneous solid mixture is comprised of(i) at least one catalytic metal and(ii) at least one metal inorganic network;wherein the metal inorganic network is a metal carbide, nitride, hydroxide, carbonitride, oxynitride, boride, and/or borocarbide, or a metal oxide, wherein the metal in the metal inorganic network is one or more of aluminum, titanium, zirconium, manganese, zinc, iron, calcium, and/or manganese and excluding silicon and cerium; andwherein the directionally aligned tubular meso-channel pores are formed by preparing the homogeneous solid mixture from a gel formed in the presence of a solvent, modifier, an inorganic halide, sulfate, nitrate, and/or sulfide salt precursor of the catalytic metal, an inorganic precursor of the metal inorganic network, and a templating agent,wherein the templating agent comprises an octylphenol ethoxylate having a structure [I] wherein “n” is an integer having a value of about 8 to 20. 2. The catalyst composition of claim 1, wherein “n” is an integer having a value of 12. 3. The catalyst composition of claim 1, wherein “n” is an integer having a value of 16. 4. The catalyst composition of claim 1, wherein the catalytic metal is a transition metal. 5. The catalyst composition of claim 1, wherein the catalytic metal comprises silver, gold, palladium, or platinum. 6. The catalyst composition of claim 1, wherein the catalytic metal comprises cobalt, nickel, or iron. 7. The catalyst composition of claim 1, wherein the metal inorganic network comprises alumina. 8. The catalyst composition of claim 1, wherein the pores are periodically spaced. 9. The catalyst composition of claim 1, wherein the pores have a periodicity in a range from about 5 nanometers to about 15 nanometers. 10. A catalyst composition according to claim 1 wherein n is an integer having a value of about 12 to 20. 11. A catalyst composition according to claim 1 wherein the precursor of the metal inorganic network is an inorganic alkoxide. 12. A catalyst composition according to claim 1 wherein the precursor of the metal inorganic network is aluminum alkoxide and the catalytic metal salt is silver nitrate. 13. A catalyst composition according to claim 1 wherein the catalytic metal is dispersed throughout the homogeneous solid mixture and throughout the pores of the solid mixture by preparing the homogeneous solid mixture from a gel formed in the presence of a solvent, modifier, an inorganic halide, sulfate, nitrate, and/or sulfide salt precursor of the catalytic metal, an inorganic precursor of the metal inorganic network, and a templating agent. 14. A catalyst composition that converts nitrogen oxides and carbon dioxide in exhaust streams generated by combustion of fossil fuels, comprising: a homogeneous solid mixture having ordered directionally aligned tubular meso-channel pores having an average diameter in a range of about 1 nanometer to about 15 nanometers, wherein the homogeneous solid mixture is comprised of(i) at least one catalytic metal intermixed with(ii) at least one metal inorganic network;wherein the metal inorganic network is a metal carbide, nitride, hydroxide, carbonitride, oxynitride, boride, and/or borocarbide, or a metal oxide, wherein the metal in the metal inorganic network is one or more of aluminum, titanium, zirconium, manganese, zinc, iron, calcium, and/or manganese and excluding silicon and cerium; andwherein the directionally aligned tubular meso-channel pores are formed by preparing the homogeneous solid mixture by calcination of a gel formed in the presence of a solvent, modifier, an inorganic silver salt, an aluminum alkoxide precursor of the metal inorganic network, and a templating agent, andwherein the templating agent comprises an octylphenol ethoxylate having a structure [I] wherein “n” is an integer having a value of about 12 to 20.
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