A substrate for a catalytic converter, comprising an open cell carbon foam having a geometric surface area of at least about 5000 m.sup.2/m.sup.3 and a permeability of at least about 8.0 darcys.

A substrate for a catalytic converter, comprising an open cell carbon foam having a geometric surface area of at least about 5000 m.sup.2/m.sup.3 and a permeability of at least about 8.0 darcys.

A method for the preparation of zirconia-multi-walled carbon nanotube nanocomposite utilizing Pluronics as templating agents is described. An efficient method for producing hydrogen gas using the nanocomposite as a photocatalyst.

Provided are a method of synthesizing molybdenum dioxide (MoO.sub.2) directly onto a metal substrate to form a coating on the surface of the substrate, products having a coated metal surface produced by the disclosed method, and their uses to decontaminate water and/or air. The coated metal surface disclosed herein also may be used as a structural component of a Li-ion battery, a supercapacitor, or a sensor for detecting a molecule.

A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate; and a first catalytic region on the substrate; wherein the first catalytic region comprises a first platinum group metal (PGM) component and a first inorganic oxide, wherein the first PGM component comprises PGM nanoparticles, wherein the PGM nanoparticles have no more than 100 PGM atoms, and wherein the PGM nanoparticles have a mean particle size of 1 nm to 10 nm with a standard deviation (SD) no more than 1 nm.

The invention relates to a catalyst composition, suitable for producing ethylene and other commercially high value C.sub.2+ hydrocarbons from methane. The composition contains a silver promoted mixed metal catalyst composition comprising at least two rare earth elements and an alkaline rare earth metal element. The catalyst composition has high catalyst activity and enables oxidative coupling of methane reactions to be conducted at a low reactor temperature while retaining sufficient catalyst selectivity. The invention further provides a method for preparing such a catalyst composition and a process for producing C.sub.2+ hydrocarbons, using such a catalyst composition.

Nanoparticles that can be used as hydrosilylation and dehydrogenative silylation catalysts. The nanoparticles have at least one transition metal with an oxidation state of 0, chosen from the metals of columns 8, 9 and 10 of the periodic table, and at least one carbonyl ligand, preferably a silicide.

A novel catalyst includes a plurality of nanoparticles, each nanoparticle including a core made of a catalytic metal and a porous shell surrounding the core, made of metal oxide, the porous shell preserving a catalytic function of the core and reducing reduction of the core and coalescence of the nanoparticles.

Disclosed is a method for making a material having supported micro- and/or nanostructures, the method includes (a) obtaining a substrate comprising a precursor material and an electrically conductive layer of micro- or nanostructures embedded into at least a portion of a first surface of the substrate, and (b) applying a voltage across the electrically conductive layer to heat the micro- or nanostructures, wherein the heat converts the precursor material into micro- and/or nanostructures.

The present disclosure provides oxidative coupling of methane (OCM) systems for small scale and world scale production of olefins. An OCM system may comprise an OCM subsystem that generates a product stream comprising C.sub.2+ compounds and non-C.sub.2+ impurities from methane and an oxidizing agent. At least one separations subsystem downstream of, and fluidically coupled to, the OCM subsystem can be used to separate the non-C.sub.2+ impurities from the C.sub.2+ compounds. A methanation subsystem downstream and fluidically coupled to the OCM subsystem can be used to react H.sub.2 with CO and/or CO.sub.2 in the non-C.sub.2+ impurities to generate methane, which can be recycled to the OCM subsystem. The OCM system can be integrated in a non-OCM system, such as a natural gas liquids system or an existing ethylene cracker.