Method for fabricating hollow metal nano particles supported on carrier

Patent metadata

Field	Value
Publication number	US-9517460-B2
Application number	US-201314649446-A
Country	US
Kind code	B2
Filing date	Dec 27, 2013
Priority date	Dec 27, 2012
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

The present application relates to a method for fabricating hollow nano particles supported on carrier.

First claim

The invention claimed is:

1. A method for fabricating catalyst comprising hollow metal nano particles supported on a carrier, the method comprising:
forming a solution by adding a first metal salt, a second metal salt, and a surfactant to a solvent which consists of water;
forming hollow metal nano particles having an average particle diameter of 30 nm or less by adding a reducing agent to the solution; and
supporting the hollow metal nano particles on a carrier,
wherein the forming of the solution comprises forming a micelle by the surfactant, and surrounding the outside of the micelle by the first metal salt and the second metal salt,
the forming of the hollow metal nano particles comprises forming the micelle region to a hollow form, and
a concentration of the surfactant in the solution is 0.2 time to 5 times a critical micelle concentration (CMC) to water.

2. The method of claim 1 , wherein the supporting of the hollow metal nano particles on a carrier comprises adding the carrier after the forming of the hollow metal nano particles.

3. The method of claim 1 , wherein the carrier is a carbon-based material or an inorganic fine particle.

4. The method of claim 1 , wherein a carbon number of the chains of the surfactant is 15 or less.

5. The method of claim 1 , wherein the surfactant is an anionic surfactant.

6. The method of claim 5 , wherein the anionic surfactant comprises NH 4 + , K + , Na + , or Li + as a counter ion.

7. The method of claim 1 , wherein the surfactant is a cationic surfactant.

8. The method of claim 7 , wherein the cationic surfactant comprises I − , Br − , or Cl − as a counter ion.

9. The method of claim 1 , wherein the forming of the solution comprises further adding a non-ionic surfactant.

10. The method of claim 1 , wherein the forming of the solution comprises further adding a stabilizer.

11. The method of claim 1 , wherein the first metal of the first metal salt and the second metal of the second metal salt are each independently selected from the group consisting of metals belonging to Group 3 to Group 15 of the periodic table, metalloids, lanthanide metals, and actinide metals.

12. The method of claim 1 , wherein the first metal of the first metal salt and the second metal of the second metal salt are each independently selected from the 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).

13. The method of claim 1 , wherein each of the first metal salt and the second metal salt is nitrate, halide, hydroxide, or sulfate of the first metal and the second metal.

14. The method of claim 1 , wherein a molar ratio of the first metal salt to the second metal salt in the solution is 1:5 to 10:1.

15. The method of claim 1 , wherein the fabrication method is carried out at room temperature.

16. The method of claim 1 , wherein the reducing agent has a standard reduction potential of −0.23 V or less.

17. The method of claim 1 , wherein a particle diameter of the hollow metal nano particles is within a range from 80% to 120% of an average particle diameter of the hollow metal nano particles.

18. The method of claim 1 , further comprising:
after the forming of the hollow metal nano particles, removing the surfactant inside the hollow metal nano particles.

19. The method of claim 1 , wherein the hollow metal nano particles have an average particle diameter of 20 nm or less.

20. The method of claim 1 , wherein the hollow metal nano particles have a spherical shape.

21. The method of claim 1 , wherein a volume of the hollow portion is 50% by volume or more of a total volume of the hollow metal nano particle.

22. The method of claim 1 , wherein the hollow metal nano particle comprises: a hollow core; and a shell portion comprising a first metal and a second metal.

23. The method of claim 22 , wherein the shell portion comprises: at least one first shell comprising a first metal; and at least one second shell comprising a second metal.

24. The method of claim 22 , wherein the shell portion comprises at least one shell comprising a first metal and a second metal.

25. The method of claim 22 , wherein the shell portion has a thickness of 5 nm or less.

26. A method for fabricating catalyst comprising hollow metal nano particles supported on a carrier, the method comprising:
forming a composition by adding a carrier, a first metal salt, a second metal salt, and a surfactant to a solvent which consists of water; and
forming hollow metal nano particles supported on the carrier by adding a reducing agent to the composition,
wherein the forming of the solution comprises forming a micelle by the surfactant, and surrounding the outside of the micelle by the first metal salt and the second metal salt,
the hollow metal nano particle comprises a hollow form formed by the micelle region,
the hollow metal nano particles have an average particle diameter of 30 nm or less, and
a concentration of the surfactant in the solution is 0.2 time to 5 times a critical micelle concentration (CMC) to water.

27. The method of claim 26 , wherein the forming of the composition is mixing the carrier with a solution formed by adding the first metal salt, the second metal salt and the surfactant to the solvent which consists of water.

28. The method of claim 26 , wherein the forming of the composition is adding the carrier to a solution formed by adding the first metal salt, the second metal salt and the surfactant to the solvent which consists of water and dispersing the composition.

29. The method of claim 26 , wherein the carrier is a carbon-based material or an inorganic fine particle.

30. The method of claim 26 , wherein the surfactant is an anionic surfactant.

31. The method of claim 30 , wherein the anionic surfactant comprises NH 4 + , K + , Na + , or Li + as a counter ion.

32. The method of claim 26 , wherein the surfactant is a cationic surfactant.

33. The method of claim 32 , wherein the cationic surfactant comprises I − , Br − , or Cl − as a counter ion.

34. The method of claim 26 , wherein the forming of the solution comprises further adding a non-ionic surfactant.

35. The method of claim 26 , wherein the forming of the solution comprises further adding a stabilizer.

36. The method of claim 26 , wherein the first metal of the first metal salt and the second metal of the second metal salt are each independently selected from the group consisting of metals belonging to Group 3 to Group 15 of the periodic table, metalloids, lanthanide metals, and actinide metals.

37. The method of claim 26 , wherein the first metal of the first metal salt and the second metal of the second metal salt are each independently selected from the 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 (A

Assignees

• Lg Chemical Ltd

Inventors

• Cho Jun Yeon
• Kim Sang Hoon
• Hwang Gyo Hyun
• Kim Kwanghyun

Classifications

• B22F1/0549 Primary

  Hollow particles, including tubes and shells · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J35/45

  Nanoparticles · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• B01J35/026

  Operations & Transport · mapped topic