Composite body having nanoparticles uniformly dispersed in nano-sized pores in support, and method for producing same

Patent metadata

Field	Value
Publication number	US-11801501-B2
Application number	US-201917269529-A
Country	US
Kind code	B2
Filing date	Jan 25, 2019
Priority date	Aug 21, 2018
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

Provided are a composite in which metal nanoparticles are evenly dispersed and adsorbed to pores of a support, and a method of preparing the same. An amorphous nanostructure formed of inorganic polymers having a transition metal and a halogen element as a main chain via hydrogen bonding is used as a chemical template for forming the metal nanoparticles. The formed metal nanoparticles are evenly dispersed and adsorbed to the support with pores.

First claim

The invention claimed is:

1. A composite comprising:
a support having a large number of pores and a positive charge on its surface; and
metal nanoparticles that are adsorbed into the pores and have a diameter of 2 nm to 2.5 nm,
wherein the metal nanoparticles comprise silver (Ag), gold (Au), platinum (Pt), palladium (Pd), ruthenium (Ru), indium (Ir), osmium (Os), rhodium (Rh), cobalt (Co), sodium (Na), potassium (K), iron (Fe), cadmium (Cd), nickel (Ni), chromium (Cr), thallium (Tl), rubidium (Rb), zinc (Zn), copper (Cu), manganese (Mn), molybdenum (Mo), indium (In), gallium (Ga), bismuth (Bi), titanium (Ti), lead (Pb), aluminum (Al), magnesium (Mg) or antimony (Sb).

2. The composite of claim 1 , wherein the metal nanoparticle is a single crystal, and has a (100), (111) or (002) plane.

3. The composite of claim 2 , wherein, in the metal nanoparticle, the (100), (111) or (002) plane on a scanning transmission microscopic image has a lattice constant of 0.22 nm to 0.24 nm.

4. The composite of claim 2 , wherein the metal nanoparticle has a higher standard reduction potential than that of copper, and comprises silver (Ag), gold (Au), platinum (Pt), palladium (Pd), ruthenium (Ru), osmium (Os), iridium (Ir) or rhodium (Rh).

5. The composite of claim 1 , wherein the metal nanoparticle is composed of two or more kinds of metal elements, and is an amorphous alloy.

6. The composite of claim 5 , wherein the two or more kinds of metal elements have a higher standard reduction potential than copper, and include silver (Ag), gold (Au), platinum (Pt), palladium (Pd), ruthenium (Ru), osmium (Os), iridium (Ir) or rhodium (Rh).

7. The composite of claim 1 , wherein the support is porous silica having a positive charge on the surface thereof.

8. The composite of claim 7 , wherein the positive charge is NH + or NH 3 + .

Assignees

• Korea Inst Sci & Tech

Inventors

• Hur Ka Hyun
• Kim Min Seok

Classifications

• B01J37/0009

  Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst · CPC title

• B01J37/04

  Mixing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• B01J23/38 Primary

  of noble metals · CPC title

• B01J35/80

  characterised by their amorphous structures · CPC title