This addition-curable silicone composition contains (A) an organopolysiloxane having at least two unsaturated aliphatic hydrocarbon groups in each molecule, (B) an organohydrogenpolysiloxane in an amount that provides a value of 0.5-5 for the ratio of the number of SiH groups to the total number of unsaturated aliphatic hydrocarbon groups in the component (A), and (C) an effective amount of hydrosilylation catalyst microparticles that have a microcapsule structure containing a platinum-group metal catalyst-containing organic compound or polymer compound as a core material and a three-dimensional crosslinked polymer compound obtained by polymerizing at least one polyfunctional monomer as a wall material, the platinum-group metal catalyst-containing organic compound or polymer compound having a dynamic viscosity of 10-100,000 mm.sup.2/s at 25 C.

Provided are a polymer capsule loaded with transition metal particles having excellent water dispersibility and stability, and a method for preparing the same. Specifically, the polymer capsule loaded with transition metal particles according to the present invention includes a surface-modified polymer capsule surface-modified to thereby have a positive zeta potential in a dispersed state in water; and transition metal particles loaded on a surface of the surface-modified polymer capsule. In addition, a method for preparing a polymer capsule loaded with transition metal particles according to the present invention includes a) preparing a polymer capsule; b) surface-modifying the polymer capsule to prepare a polymer capsule having a positive zeta potential in a dispersed state in water; and c) sequentially adding a water-soluble transition metal precursor and a reducing agent to a water dispersion of the surface-modified polymer capsule obtained in step b).

Shaped porous carbon products and processes for preparing these products are provided. The shaped porous carbon products can be used, for example, as catalyst supports and adsorbents. Catalyst compositions including these shaped porous carbon products, processes of preparing the catalyst compositions, and various processes of using the shaped porous carbon products and catalyst compositions are also provided.

The present specification relates to a carrier-nanoparticle complex, a method for preparing the same, and a catalyst comprising the same.

Embodiments of the present disclosure provide for supported Ni/Pt bimetallic nanoparticles having a Ni core and a Pt layer disposed on the surface of the Ni core, compositions including supported NiPt nanoparticles, methods of making supported NiPt nanoparticles, methods of using supported NiPt nanoparticles, and the like.

The present invention discloses catalyst and method for producing light olefins directly from synthesis gas by a one-step process, and particularly relates to method and catalyst for directly converting synthesis gas into light olefins by a one-step process. The provided catalysts are composite materials formed of multicomponent metal oxide composites and inorganic solid acids with hierarchical pore structures. The inorganic solid acids have a hierarchical pore structure having micropores, mesopores and macropores. The metal composites can be mixed with or dispersed on surfaces or in pore channels of the inorganic solid acid and can catalyze the synthesis gas conversion to a C.sub.2-C.sub.4 light hydrocarbon product containing two to four carbon atoms. The single pass conversion of CO is 10%-60%. The selectivity of light hydrocarbon in all hydrocarbon products can be up to 60%-95%, wherein the selectivity of light olefins (C.sub.2.sup.C.sub.4.sup.) is 50%-85%.

The present specification relates to a yolk-shell particle, a catalyst, and a method of manufacturing the same.

A composite photocatalyst is provided. The composite photocatalyst includes a nanomotor and a plurality of cocatalysts, the nanomotor comprises a shell formed by porous material, at least one inner core formed by a photocatalyst, and a cavity between the shell and the at least one inner core, the plurality of cocatalysts are located in the cavity. The plurality of cocatalysts are selected from the group consisting of metal nanoparticles, metal oxide nanoparticles, metal sulfide nanoparticles, phosphate nanoparticles, up-conversion material nanoparticles, and any combination thereof. A method for making the composite photocatalyst and application thereof are further provided. The plurality of cocatalysts and the nanomotor forms a photocatalytic synergistic reaction system, improving photo-catalytic activity of the composite photocatalyst.

To provide a photocatalyst material having alkaline resistance and showing less deterioration in photocatalyst performance due to a poisoning effect and to provide a method for producing the photocatalyst material, a photocatalyst material (1A) according to one embodiment of the present invention includes: core particles (2) containing tungsten oxide; a promoter (4) formed on the surface of the core particles (2); and a shell layer (3) made of titanium oxide and covering the entire surface of both the core particles (2) and the promoter (4).

Catalysts, catalytic systems and related synthetic methods for in situ production of H.sub.2O.sub.2 and use thereof in reaction with oxidizable substrates.