Carrier-nanoparticle complex and preparation method thereof

Patent metadata

Field	Value
Publication number	US-10497940-B2
Application number	US-201515504229-A
Country	US
Kind code	B2
Filing date	Aug 18, 2015
Priority date	Aug 19, 2014
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

The present specification relates to a carrier-nanoparticle complex and a preparation method thereof.

First claim

The invention claimed is:

1. A carrier-nanoparticle complex comprising:
one or more hollow metal nanoparticles comprising a hollow core and a shell portion which surrounds the hollow core; and
a carbon-based carrier that supports the hollow metal nanoparticle,
wherein at least a portion of a surface of the carrier is coated with a polymer electrolyte comprising one or more amine groups,
wherein the at least one hollow metal nanoparticle is bonded to the amine group of the polymer electrolyte to be supported on the carbon-based carrier,
wherein more than half of the hollow metal nanoparticles maintain a hollow structure at a temperature of 200° C. or more.

2. The carrier-nanoparticle complex of claim 1 , wherein the shell portion of the hollow metal nanoparticle comprises two or more metals.

3. The carrier-nanoparticle complex of claim 1 , wherein the shell portion comprises a first metal and a second metal, and a reduction potential of the second metal is lower than a reduction potential of the first metal.

4. The carrier-nanoparticle complex of claim 1 , wherein the hollow metal nanoparticles have an average particle diameter of 30 nm or less.

5. The carrier-nanoparticle complex of claim 1 , wherein the hollow metal nanoparticle has a spherical shape.

6. The carrier-nanoparticle complex of claim 1 , wherein a volume of a hollow of the hollow metal nanoparticle is 10% to 90% of a total volume of the hollow metal nanoparticle.

7. The carrier-nanoparticle complex of claim 1 , wherein the shell portion of the hollow metal nanoparticle comprises two or more metals selected from a group consisting of platinum (Pt), ruthenium (Ru), rhodium (Rh), molybdenum (Mo), osmium (Os), iridium (Ir), rhenium (Re), palladium (Pd), vanadium (V), tungsten (W), cobalt (Co), iron (Fe), selenium (Se), nickel (Ni), bismuth (Bi), tin (Sn), chromium (Cr), titanium (Ti), gold (Au), cerium (Ce), silver (Ag), and copper (Cu).

8. The carrier-nanoparticle complex of claim 1 , wherein the polymer electrolyte comprises a polyallylamine hydrochloride (PAH)-based material.

9. The carrier-nanoparticle complex of claim 1 , wherein the carbon-based carrier comprises carbon black, carbon nanotube (CNT), graphite, graphene, activated carbon, mesoporous carbon, carbon fiber, carbon nano wire, or mixtures thereof.

10. The carrier-nanoparticle complex of claim 1 , wherein a content of the hollow nanoparticles is 5 wt % to 60 wt % based on the carrier-nanoparticle complex.

11. A method for preparing the carrier-nanoparticle complex of claim 1 , the method comprising:
coating the surface of the carbon-based carrier with the polymer electrolyte comprising one or more amine groups;
forming a solution by adding the carbon-based carrier and two or more metal precursors to a solvent; and
forming one or more hollow metal nanoparticles supported onto the carrier by adding a reducing agent to the solution.

12. The method of claim 11 , wherein the coating of the carrier comprises a process of stirring an aqueous solution comprising the polymer electrolyte comprising one or more amine groups and the carbon-based carrier.

13. The method of claim 11 , wherein the solution further comprises a capping agent.

14. The method of claim 11 , wherein the metal precursor comprises a first metal precursor and a second metal precursor in a molar ratio of the first metal precursor to the second metal precursor is 1:1 to 1:5.

15. The method of claim 11 , wherein the solvent of the solution comprises water.

16. The method of claim 11 , wherein the nanoparticles are formed by adding the reducing agent under an atmosphere of 10° C. to 80° C.

17. A catalyst comprising the carrier-nanoparticle complex of claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Kim Sang Hoon
• Cho Jun Yeon
• Kim Kwanghyun
• Bang Jungup
• Hwang Gyo Hyun
• Choi Ran

Classifications

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• H01M4/8803

  Supports for the deposition of the catalytic active composition (H01M4/90 takes precedence) · CPC title

• H01M4/9041 Primary

  Metals or alloys (H01M4/92 takes precedence) · CPC title

• H01M4/9083 Primary

  on carbon or graphite · CPC title

• H01M4/663 Primary

  containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres · CPC title