Carrier-nanoparticle complex and preparation method thereof

Patent metadata

Field	Value
Publication number	US-2017279124-A1
Application number	US-201515504229-A
Country	US
Kind code	A1
Filing date	Aug 18, 2015
Priority date	Aug 19, 2014
Publication date	Sep 28, 2017
Grant date	—

Abstract

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

First claim

1 . A carrier-nanoparticle complex comprising:
one or more hollow metal nanoparticles including a hollow core and a shell portion which surrounds the hollow core; and a carbon-based carrier onto which the hollow metal nanoparticle is supported, wherein at least a portion of a surface of the carrier is coated with a polymer electrolyte comprising one or more amine groups.

2 . The carrier-nanoparticle complex of claim 1 , 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.

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

4 . 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.

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

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

7 . 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.

8 . 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).

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

10 . The carrier-nanoparticle complex of claim 1 , wherein more than half or more of the hollow metal nanoparticles maintain a hollow structure at a temperature of 200° C. or more.

11 . The carrier-nanoparticle complex of claim 1 , wherein the carbon-based carrier comprises one or more selected from a group consisting of carbon black, carbon nanotube (CNT), graphite, graphene, activated carbon, mesoporous carbon, carbon fiber, and carbon nano wire.

12 . 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.

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

14 . The method of claim 13 , 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.

15 . The method of claim 13 , wherein the solution in the forming of the solution further comprises a capping agent.

16 . The method of claim 13 , wherein the metal precursor comprises a first metal precursor and a second metal precursor, and a molar ratio of the first metal precursor to the second metal precursor is 1:1 to 1:5.

17 . The method of claim 13 , wherein the solvent in the forming of the solution comprises water.

18 . The method of claim 13 , wherein the forming of the nanoparticles is adding the reducing agent under an atmosphere of 10° C. to 80° C.

19 . 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

• H01M4/663 Primary

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

• H01M8/0245

  in the form of layered or coated products · CPC title

• H01M4/9075 Primary

  Catalytic material supported on carriers, e.g. powder carriers (H01M4/8807, H01M4/881, H01M4/8814, H01M4/925 take precedence) · CPC title

• H01M4/926

  on carbon or graphite · CPC title