The present invention relates to a catalyst composition comprising a gold nanoparticle superlattice embedded in hierarchical porous silica and a method for manufacturing the same. The catalyst composition comprising a gold nanoparticle superlattice embedded in hierarchical porous silica according to the present invention comprises micropores and mesopores in the superlattice, so that these pores are channelized to allow the rapid access of reactants to surfaces of gold nanoparticles, and the catalyst composition is very structurally stable and has excellent catalytic activity, and thus has an effect of exhibiting a CO conversion rate of 100% at room temperature.

An alloy composed of three or more types of elements, wherein all the standard deviation of distribution in the alloy of each element constituting the alloy are 15 atomic % or less provides a novel alloy composed of three or more types of elements and having a high solid solution uniformity.

Synthesis of chiral polyvinylpyrrolidinone (CSPVP) compounds, complexes of CSPVP with a core species, such as a bimetallic nanocluster catalyst, and selective C—H bond oxidation reactions utilizing such complexes are disclosed. These reaction products can be used as reagents in the synthesis of complex organic molecules, such as bioactive products, and C—H bond oxidation of complex molecules including various drugs and natural products.

Synthesis of chiral polyvinylpyrrolidinone (CSPVP) compounds, complexes of CSPVP with a core species, such as a bimetallic nanocluster catalyst, and selective C—H bond oxidation reactions utilizing such complexes are disclosed. These reaction products can be used as reagents in the synthesis of complex organic molecules, such as bioactive products, and C—H bond oxidation of complex molecules including various drugs and natural products.

Methods for preparing ceria-zirconia (CZO) materials calcined with precious group metals (PGM) include calcining a CZO material with PGM. The calcined CZO/PGM catalyst is reduced at a temperature of ≥1000° C. to ≤1100° C. for a time of ≥0.5 hour to 1 hour to form a (CZO/PGM)-pyrochlore catalyst. The (CZO/PGM)-pyrochlore catalyst exhibits superior oxygen storage capacity characteristics as a three-way catalyst in vehicle exhaust gas systems.

Methods for preparing ceria-zirconia (CZO) materials calcined with precious group metals (PGM) include calcining a CZO material with PGM. The calcined CZO/PGM catalyst is reduced at a temperature of ≥1000° C. to ≤1100° C. for a time of ≥0.5 hour to 1 hour to form a (CZO/PGM)-pyrochlore catalyst. The (CZO/PGM)-pyrochlore catalyst exhibits superior oxygen storage capacity characteristics as a three-way catalyst in vehicle exhaust gas systems.

A heterogeneous catalyst comprising a support and gold, wherein: (i) said support comprises alumina, (ii) said catalyst comprises from 0.1 to 5 wt % of gold, (iii) at least 90 wt % of the gold is in the outer 60% of catalyst volume, and (iv) particles of the catalyst have an average diameter from 200 microns to 30 mm; wherein weight percentages are based on weight of the catalyst.

A heterogeneous catalyst comprising a support and gold, wherein: (i) said support comprises alumina, (ii) said catalyst comprises from 0.1 to 5 wt % of gold, (iii) at least 90 wt % of the gold is in the outer 60% of catalyst volume, and (iv) particles of the catalyst have an average diameter from 200 microns to 30 mm; wherein weight percentages are based on weight of the catalyst.

Provided is a composite body that includes halloysite powder including a granule in which halloysite including a halloysite nanotube is aggregated, and a transition metal catalyst carried in the halloysite powder. The granule preferably includes a first pore derived from a tube hole of the halloysite nanotube, and a second pore different from the first pore. The transition metal catalyst preferably includes at least one element selected from the group consisting of iron, ruthenium, cobalt, nickel and silver.

Provided is a composite body that includes halloysite powder including a granule in which halloysite including a halloysite nanotube is aggregated, and a transition metal catalyst carried in the halloysite powder. The granule preferably includes a first pore derived from a tube hole of the halloysite nanotube, and a second pore different from the first pore. The transition metal catalyst preferably includes at least one element selected from the group consisting of iron, ruthenium, cobalt, nickel and silver.