An open-pore catalyst support comprising a material that comprises a natural sheet silicate and ZrO.sub.2. In order to provide a catalyst support, by means of which alkenyl acetate catalysts can be prepared which are characterized by a high level of alkenyl acetate activity over a relatively long period, the catalyst support comprises a material that comprises a natural sheet silicate and ZrO.sub.2 in the tetragonal modification.

Provided are catalyst composites useful for the production of vinyl acetate monomer, as well as methods of making using same. The catalyst composites may comprise a support comprising silica and about 1 to about 3 wt-% alumina, wherein the support has a surface area of about 175 to about 300 m.sup.2/g; and an eggshell layer on the support comprising Pd and Au.

The present invention pertains to novel core-shell particles comprising a core of iron oxide and a shell of cobalt oxide, characterized in that they are spherical with a number average diameter, as measured by TEM, of between 1 and 20 nm. This invention is also directed to their uses in the manufacture of a catalyst, and to the method for preparing these particles, by precipitating cobalt oxide onto magnetite or hematite particles which are themselves precipitated from Fe(III) and optionally Fe(II) salts.

The present invention relates to an egg-shell type hybrid structure of highly dispersed nanoparticles-metal oxide support, a preparation method thereof, and a use thereof. Specifically, the present invention relates to an egg-shell type hybrid structure of highly dispersed nanoparticles-metal oxide support, providing an excellent platform in a size of nanometers or micrometers which can support nanoparticles selectively in the porous shell portion by employing a metal oxide support with an average diameter of nanometers or micrometers including a core of nonporous metal oxide and a shell of porous metal oxides, a preparation method thereof, and a use thereof.

A process for upgrading plastics to olefins, paraffins, and aromatics with a core-shell catalyst in a fluidized bed reactor is described.

A process for upgrading plastics to olefins, paraffins, and aromatics with a core-shell catalyst in a fluidized bed reactor is described.

Provided is a water electrolysis catalyst with a core-shell structure, which has a vanadium-doped cobalt nitride (VCo.sub.4N) core; and a cobalt-nickel phosphate (CoNiPO.sub.x, x is a natural number) shell.

Provided is a water electrolysis catalyst with a core-shell structure, which has a vanadium-doped cobalt nitride (VCo.sub.4N) core; and a cobalt-nickel phosphate (CoNiPO.sub.x, x is a natural number) shell.

The present disclosure discloses a supported TiO.sub.x core-shell catalyst and a preparation method and application thereof. An Al.sub.2O.sub.3 support is loaded with a Ni@TiO.sub.x core-shell structure, and the core-shell structure includes a metal Ni core and a TiO.sub.x shell. The preparation method includes the steps of firstly, adding aluminum alkoxide, an organotitanium compound, and a surfactant to isopropanol solvent and stirring them to be mixed well, and then dropwise adding dilute nitric acid to be hydrolyzed completely; aging obtained sol at room temperature, and completely drying it under vacuum; then calcining the obtained solid step by step; impregnating the solid in a Ni(NO.sub.3).sub.3.Math.6H.sub.2O solution to be completely dried after being ultrasonically dispersed well; and finally calcining and then reducing the obtained solid, to obtain the Al.sub.2O.sub.3 supported Ni@TiO.sub.x core-shell catalyst.

The present disclosure discloses a supported TiO.sub.x core-shell catalyst and a preparation method and application thereof. An Al.sub.2O.sub.3 support is loaded with a Ni@TiO.sub.x core-shell structure, and the core-shell structure includes a metal Ni core and a TiO.sub.x shell. The preparation method includes the steps of firstly, adding aluminum alkoxide, an organotitanium compound, and a surfactant to isopropanol solvent and stirring them to be mixed well, and then dropwise adding dilute nitric acid to be hydrolyzed completely; aging obtained sol at room temperature, and completely drying it under vacuum; then calcining the obtained solid step by step; impregnating the solid in a Ni(NO.sub.3).sub.3.Math.6H.sub.2O solution to be completely dried after being ultrasonically dispersed well; and finally calcining and then reducing the obtained solid, to obtain the Al.sub.2O.sub.3 supported Ni@TiO.sub.x core-shell catalyst.