Composite support, method of preparing the same, electrode catalyst including the composite support, and membrane-electrode assembly and fuel cell each including the electrode catalyst

Patent metadata

Field	Value
Publication number	US-9246175-B2
Application number	US-201313848940-A
Country	US
Kind code	B2
Filing date	Mar 22, 2013
Priority date	Jun 18, 2012
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

A composite support including: an ordered mesoporous carbon including mesopores having an average diameter of about 2 nanometers to about 8 nanometers; and silicon carbide dispersed in the ordered mesoporous carbon.

First claim

What is claimed is:

1. A composite support comprising:
an ordered mesoporous carbon comprising mesopores having an average diameter of about 2 nanometers to about 8 nanometers; and
a silicon carbide dispersed in the ordered mesoporous carbon,
wherein the ordered mesoporous carbon is in the form of a framework including walls which define the mesopores, and
wherein the silicon carbide is in the form of a particle and is disposed on an inner surface of the walls of the framework of the ordered mesoporous carbon.

2. The composite support of claim 1 , wherein the silicon carbide is disposed on an inner surface and on an outer surface of the walls of the framework of the ordered mesoporous carbon.

3. The composite support of claim 1 , wherein the silicon carbide is bound to the ordered mesoporous carbon.

4. The composite support of claim 1 , wherein the silicon carbide has a shape of least one selected from a spherical, platelet, amorphous, and an acicular shape.

5. The composite support of claim 1 , wherein the ordered mesoporous carbon and the silicon carbide are in a weight ratio of about 1:99 to about 30:70.

6. The composite support of claim 1 , wherein the composite support has a specific surface area of about 300 square meters per gram to about 600 square meters per gram.

7. A method of preparing a composite support, the method comprising:
contacting an ordered mesoporous silica template and a carbonaceous precursor-containing mixture to prepare a first mixture;
thermally treating the first mixture at a temperature of about 1300° C. to about 1500° C. to form a pre-composite comprising an ordered mesoporous carbon comprising mesopores having an average diameter of about 2 nanometers to about 8 nanometers, a silicon carbide dispersed in the ordered mesoporous carbon, and the ordered mesoporous silica template; and
removing the ordered mesoporous silica template from the pre-composite to prepare the composite support, wherein the composite support comprises the ordered mesoporous carbon comprising mesopores having an average diameter of about 2 nanometers to about 8 nanometers and the silicon carbide dispersed in the ordered mesoporous carbon,
wherein the ordered mesoporous carbon is in the form of a framework including walls which define the mesopores,
wherein the silicon carbide is in the form of a particle and is disposed on an inner surface of the walls of the framework of the ordered mesoporous carbon, and
wherein the silicon carbide in the pre-composite is derived from the ordered mesoporous silica template and the carbonaceous precursor of the first mixture.

8. The method of claim 7 , wherein the ordered mesoporous silica template comprises at least one selected from MCM-48, SBA-1, SBA-15, KIT-1, and MSU-1.

9. The method of claim 7 , wherein a carbonaceous precursor of the carbonaceous precursor-containing mixture comprises at least one selected from glucose, sucrose, fructose, benzene, naphthalene, anthracene, phenanthrene, pyrene, phenol-formaldehyde (PF) resin, urea-formaldehyde (UF) resin, quinoxaline, propylenediamine, 4,4′-dipyridyl, phenanthroline, p-toluenesulfonic acid, and furfuryl mercaptan.

10. The method of claim 7 , wherein the carbonaceous precursor-containing mixture further comprises a metal precursor and a solvent.

11. The method of claim 7 , wherein the thermally treating of the first mixture is performed at a temperature of about 1350° C. to about 1450° C.

12. The method of claim 7 , wherein the thermal treating of the first mixture is performed in an inert atmosphere.

13. The method of claim 7 , wherein the removing of the ordered mesoporous silica template from the pre-composite comprises contacting the pre-composite with an acid or an alkali solution capable of dissolving silica.

14. An electrode catalyst for a fuel cell, comprising: the composite support of claim 1 ; and a catalyst particle disposed on the composite support.

15. A membrane-electrode assembly for a fuel cell, the membrane-electrode assembly comprising:
a cathode;
an anode disposed opposite to the cathode; and
an electrolyte membrane disposed between the cathode and the anode,
wherein at least one of the cathode and the anode comprises the electrode catalyst of claim 14 .

16. A fuel cell comprising the membrane-electrode assembly of claim 15 .

Assignees

• Samsung Electronics Co Ltd

Inventors

• Pak Chan-Ho
• Yoo Dae-Jong
• Kim Ji-Man
• Kim Jin-Hoe

Classifications

• H01M4/9075

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

• B01J37/06

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

• H01M4/925

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

• B01J35/0033

  Operations & Transport · mapped topic

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title