Method and apparatus for manufacturing core-shell catalyst

Patent metadata

Field	Value
Publication number	US-2018159138-A1
Application number	US-201715646995-A
Country	US
Kind code	A1
Filing date	Jul 11, 2017
Priority date	Dec 7, 2016
Publication date	Jun 7, 2018
Grant date	—

Abstract

The present disclosure relates to a method and an apparatus for manufacturing a core-shell catalyst, and more particularly, to a method and an apparatus for manufacturing a core-shell catalyst, in which a particle in the form of a core-shell in which the metal nanoparticle is coated with platinum is manufactured by substituting copper and platinum through a method of manufacturing a metal nanoparticle by emitting a laser beam to a metal ingot, and providing a particular electric potential value, and as a result, it is possible to continuously produce nanoscale uniform core-shell catalysts in large quantities.

First claim

What is claimed is:

1 . A method of manufacturing a core-shell catalyst, the method comprising:
manufacturing a metal nanoparticle by emitting a laser beam to a solution containing a metal ingot; dispersing a support body into the manufactured metal nanoparticle solution, mixing a copper precursor-containing solution with the mixture, and coating a metal nanoparticle with copper by providing electric potential higher than oxidation and reduction potentials of copper; and manufacturing a particle in the form of a core-shell in which the metal nanoparticle is coated with platinum by mixing a solution containing a platinum ion with a solution containing the manufactured metal nanoparticle coated with copper and inducing a galvanic displacement reaction.

2 . The method according to claim 1 , wherein an output of the laser light source is 0.1 to 40 J/cm 2 .

3 . The method according to claim 1 , wherein the solution containing the metal ingot contains one or more types of solvents selected from water, sulfuric acid, and hydrocarbon-based compounds.

4 . The method according to claim 1 , wherein the support body is carbon or metal oxide.

5 . The method according to claim 3 , wherein 3 to 60 wt % of a total of solid-phase particles of the metal nanoparticles are contained in the solution.

6 . The method according to claim 1 , wherein the copper precursor-containing solution contains one or more types of solvents selected from sulfuric acid, perchloric acid, hydrochloric acid, and electrolytes.

7 . The method according to claim 1 , wherein the copper precursor-containing solution contains a copper precursor of 10 mM to 1 M, and the platinum ion-containing solution contains a platinum precursor of 10 mM to 1 M.

8 . The method according to claim 1 , wherein the coating of the metal nanoparticle with the copper provides electric potential in a range of 0.46 V to 0.34 V based on standard electric potential.

9 . The method according to claim 1 , wherein the manufacturing of the particle in the form of the core-shell in which the metal nanoparticle is coated with platinum provides an opportunity of allowing galvanic displacement to occur through a process of bringing the metal nanoparticle coated with copper into contact with a solution in which the platinum ion exists.

10 . An apparatus for manufacturing a core-shell catalyst, the apparatus comprising:
a titanium reaction chamber in which a part of a chamber upper surface is made of a glass material, a lower surface is a working electrode, and the working electrode is joined to one of left and right surfaces of the titanium reaction chamber; a reaction solution which is accommodated in the reaction chamber; a metal ingot holder which is accommodated in the reaction chamber; a metal ingot capsule which is accommodated on the metal ingot holder; a reference electrode and a counter electrode which are supported in the reaction solution; a power source unit which applies voltage to the electrodes; a solution injecting unit which injects a mixture solution including a copper precursor and a platinum precursor into the reaction chamber; a laser light source which emits energy to the metal ingot; a display unit which measures and displays, in real time, a copper precursor content and a platinum precursor content in the reaction chamber, the type of reaction solution, applied voltage, an output of the emitted laser beam; and a particle diameter measuring device which measures a particle diameter of the metal nanoparticle manufactured in the reaction chamber.

11 . The apparatus according to claim 10 , wherein the metal ingot capsule has a capsule shape having a hermetic structure in which the metal ingot is impregnated in the reaction solution.

12 . An apparatus for manufacturing a core-shell catalyst, the apparatus comprising: a first reactor and a second reactor, wherein the first reactor includes:
a reaction chamber in which a part of an upper surface is made of a glass material, and a metal holder on which a metal ingot is seated is formed in the reaction chamber; a metal ingot capsule which is accommodated on the metal ingot holder; a reaction solution which is accommodated in the reaction chamber; a laser light source which emits energy to the metal ingot; and a pump which moves a nanoparticle solution created in the reaction chamber to a titanium reaction chamber of the second reactor, and the second reactor includes: a titanium reaction chamber in which a chamber lower surface is a working electrode, and the working electrode is jointed to one of left and right surfaces of the titanium reaction chamber; a reaction solution which is accommodated in the reaction chamber; a reference electrode and a counter electrode which are supported in the reaction solution; a power source unit which applies voltage to the electrodes; a solution injecting unit which injects a mixture solution including a copper precursor and a platinum precursor into the reaction chamber; and a nanoparticle injecting unit which injects a nanoparticle created in the first reactor into the reaction chamber.

13 . The apparatus according to claim 12 , wherein the metal ingot capsule has a capsule shape having a hermetic structure in which the metal ingot is impregnated in the reaction solution.

14 . An apparatus for manufacturing a core-shell catalyst, the apparatus comprising:
a reaction chamber which is divided into a first region and a second region, in which a height and a diameter of the second region are greater than a height and a diameter of the first region, and the first region and second region are connected in a streamlined shape; a reaction solution which is accommodated in the reaction chamber; a laser light source which emits energy to the metal ingot in the first region; a solution injecting unit which injects a mixture solution including a copper precursor and a platinum precursor into the second region; a display unit which measures and displays, in real time, a copper precursor content and a platinum precursor content in the second region, the type of reaction solution, applied voltage, and an output of the emitted laser beam; a particle diameter measuring device which measures a particle diameter of a metal nanoparticle manufactured in the second region; a reference electrode and a counter electrode which are supported in the reaction solution in the second region; a power source unit which applies voltage to the electrodes; and a pump which circulates a solution discharged from the second region to the first region, wherein a part of an upper surface in the first region of the reaction chamber is made of a glass material, a metal ingot holder is accommodated in the reaction chamber, and a metal ingot capsule is accommodated on the metal ingot holder.

15 . The apparatus according to claim 14 , wherein the metal ingot capsule has a capsule shape having a hermetic structure in which the metal ingot is impregnated in the reaction solution.

16 . An apparatus for manufacturing a core-shell catalyst, the apparatus comprising:
a reaction chamber which is divided into a first region and a second region, in which a height and a diameter of the second region are greater than a height and a diameter of the first region, and a variable orifice, which has a central portion protruding in a streamlined shape, is provided at an end in the first region; a reaction solution which is accommodated in the reaction chamber; a laser light source which emits energy to the metal ingot in the first region; a solution injecting

Assignees

• Korea Inst Energy Res

Inventors

• Park Gu-Gon
• Hwang Sun-Mi
• Yim Sung-Dae
• Kim Chang-Soo
• Lee Won-Yong
• Yang Tae-Hyun
• Park Seok-Hee
• Kim Minjin
• Sohn Young-Jun
• Bae Byungchan
• Kim Seung-Gon
• Shin Dongwon

Classifications

• H01M4/921

  Alloys or mixtures with metallic elements · CPC title

• B01J37/0225

  of metal substrates · CPC title

• B01J2219/0892

  involving catalytically active material · CPC title

• H01M4/925

  supported on carriers, e.g. powder carriers · CPC title

• B01J37/0221 Primary

  of particles · CPC title