Gas decomposing unit, electrode for a fuel cell, and method of manufacturing the gas decomposing unit
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-021/18
B01J-021/00
B01J-023/00
D01F-009/12
출원번호
US-0857958
(2004-06-02)
우선권정보
JP-2003-361850(2003-10-22)
발명자
/ 주소
Kishi,Kentaro
Anazawa,Kazunori
Manabe,Chikara
Hirakata,Masaki
Shigematsu,Taishi
Watanabe,Miho
Watanabe,Hiroyuki
Isozaki,Takashi
Ooma,Shigeki
Okada,Shinsuke
출원인 / 주소
Fuji Xerox Co., Ltd.
대리인 / 주소
Oliff &
인용정보
피인용 횟수 :
10인용 특허 :
9
초록▼
Provided are a gas decomposing unit and an electrode for a fuel cell capable of stably supporting a gas decomposing catalyst. A gas decomposing unit and an electrode for a fuel cell each including: a carbon nanotube structure having a mesh structure in which functional groups bonded to plural carbon
Provided are a gas decomposing unit and an electrode for a fuel cell capable of stably supporting a gas decomposing catalyst. A gas decomposing unit and an electrode for a fuel cell each including: a carbon nanotube structure having a mesh structure in which functional groups bonded to plural carbon nanotubes are chemically bonded to mutually cross-link the plural carbon nanotubes; and a gas decomposing catalyst supported on the carbon nanotube structure. A method of manufacturing a gas decomposing unit characterized by including: an applying step of applying, to the surface of a substrate, a solution containing plural carbon nanotubes to which functional groups are bonded; a cross-linking step of chemically bonding the functional groups to build a mesh structure in which the plural carbon nanotubes mutually cross-link; and a supporting step of forming the carbon nanotube structure supporting a gas decomposing catalyst.
대표청구항▼
What is claimed is: 1. A gas decomposing unit comprising: a carbon nanotube structure having a mesh structure in which functional groups bonded to plural carbon nanotubes are chemically bonded to mutually cross-link the plural carbon nanotubes; and a gas decomposing catalyst supported on the carbon
What is claimed is: 1. A gas decomposing unit comprising: a carbon nanotube structure having a mesh structure in which functional groups bonded to plural carbon nanotubes are chemically bonded to mutually cross-link the plural carbon nanotubes; and a gas decomposing catalyst supported on the carbon nanotube structure. 2. A gas decomposing unit according to claim 1, wherein the carbon nanotube structure is manufactured by curing a solution containing plural carbon nanotubes to which functional groups are bonded to chemically bond the plural functional groups bonded to the carbon nanotubes to form a cross-linked site. 3. A gas decomposing unit according to claim 2, wherein the cross-linked site is structured by cross-linking the plural functional groups with a cross-linking agent in the solution, and the cross-linking agent is not self-polymerizable. 4. A gas decomposing unit according to claim 1, wherein the cross-linked site where plural carbon nanotubes mutually cross-link has a chemical structure selected from the group consisting of--COO(CH 2)2OCO--,--COOCH2CHOHCH2OCO--,--COOCH2CH(OCO--)CH2OH, and--COOCH2CH(OCO--) CH2OCO--. 5. A gas decomposing unit according to claim 2, wherein the cross-linked site is formed through chemical bonding of the plural functional groups. 6. A gas decomposing unit according to claim 5, wherein a reaction forming the chemical bonding is selected from the group consisting of dehydration condensation, a substitution reaction, an addition reaction, and an oxidative reaction. 7. A gas decomposing unit according to claim 1, wherein the cross-linked site where plural carbon nanotubes mutually cross-link comprises a cross-linked site selected from the group consisting of--COOCO--,--O--,--NHCO--,--COO--,--NCH--,--NH--,--S--,--O--,--NHCOO--, and--S--S--. 8. A gas decomposing unit according to claim 1, wherein the plural carbon nanotubes comprise multi-wall carbon nanotubes. 9. An electrode for a fuel cell comprising the gas decomposing unit according to claim 1, wherein the carbon nanotube structure serves as one side of the electrode. 10. A method of manufacturing a gas decomposing unit comprising: an applying step of applying, to a surface of a substrate, a solution containing plural carbon nanotubes to which functional groups are bonded; a cross-linking step of chemically bonding the functional groups to build a mesh structure in which the plural carbon nanotubes mutually cross-link; and a supporting step of forming the carbon nanotube structure supporting a gas decomposing catalyst. 11. A method of manufacturing a gas decomposing unit according to claim 10, wherein the solution to be used in the applying step contains the gas decomposing catalyst. 12. A method of manufacturing a gas decomposing unit according to claim 10, wherein the supporting step comprises a supplying step of supplying the gas decomposing catalyst onto the carbon nanotube structure. 13. A method of manufacturing a gas decomposing unit according to claim 12, wherein the gas decomposing catalyst comprises a catalyst having a characteristic of decomposing a carbon nanotube in one of the solution and the cross-linking step. 14. A method of manufacturing a gas decomposing unit according to claim 10, wherein: the solution contains a cross-linking agent that cross-links the plural functional groups together; and the cross-linking agent is not self-polymerizable. 15. A method of manufacturing a gas decomposing unit according to claim 14, wherein: each of the functional groups is selected from the group consisting of--OH,--COOH,--COOR (where R represents a substituted or unsubstituted hydrocarbon group),--COX (where X represents a halogen atom),--NH2, and--NCO; and the cross-linking agent is capable of prompting a cross-linking reaction with the selected functional groups. 16. A method of manufacturing a gas decomposing unit according to claim 14, wherein: the cross-linking agent is selected from the group consisting of a polyol, a polyamine, a polycarboxylic acid, a polycarboxylate, a polycarboxylic acid halide, a polycarbodiimide, and a polyisocyanate; and each of the functional groups is capable of prompting a cross-linking reaction with the selected cross-linking agent. 17. A method of manufacturing a gas decomposing unit according to claim 14, wherein: each of the functional groups is selected from the group consisting of--OH,--COOH,--COOR (where R represents a substituted or unsubstituted hydrocarbon group),--COX (where X represents a halogen atom),--NH2, and--NCO; the cross-linking agent is selected from the group consisting of a polyol, a polyamine, a polycarboxylic acid, a polycarboxylate, a polycarboxylic acid halide, a polycarbodiimide, and a polyisocyanate; and the functional groups and the cross-linking agent are respectively selected for a combination capable of prompting a mutual cross-linking reaction. 18. A method of manufacturing a gas decomposing unit according to claim 15, wherein each of the functional groups comprises--COOR (where R represents a substituted or unsubstituted hydrocarbon group) . 19. A method of manufacturing a gas decomposing unit according to claim 16, wherein the cross-linking agent comprises a polyol. 20. A method of manufacturing a gas decomposing unit according to claim 16, wherein the cross-linking agent is selected from the group consisting of glycerin, ethylene glycol, butenediol, hexynediol, hydroquinone, and naphthalenediol. 21. A method of manufacturing a gas decomposing unit according to claim 10, wherein the solution further contains a solvent. 22. A method of manufacturing a gas decomposing unit according to claim 14, wherein the cross-linking agent also functions as a solvent. 23. A method of manufacturing a gas decomposing unit according to claim 10, wherein a reaction forming the chemical bonding comprises a reaction for chemically bonding the plural functional groups. 24. A method of manufacturing a gas decomposing unit according to claim 23, wherein the solution further contains an additive that chemically bonds the plural functional groups. 25. A method of manufacturing a gas decomposing unit according to claim 24, wherein the reaction comprises dehydration condensation and the additive comprises a condensation agent. 26. A method of manufacturing a gas decomposing unit according to claim 25, wherein each of the functional groups is selected from the group consisting of--COOR (where R represents a substituted or unsubstituted hydrocarbon group),--COOH,--COX (where X represents a halogen atom),--OH,--CHO--, and--NH2. 27. A method of manufacturing a gas decomposing unit according to claim 25, wherein each of the functional groups comprises--COOH. 28. A method of manufacturing a gas decomposing unit according to claim 25, wherein the condensation agent is selected from the group consisting of sulfuric acid, N-ethyl-N'-(3-dimethylaminopropyl) carbodiimide, and dicyclohexyl carbodiimide. 29. A method of manufacturing a gas decomposing unit according to claim 24, wherein the reaction comprises a substitution reaction and the additive comprises a base. 30. A method of manufacturing a gas decomposing unit according to claim 29, wherein each of the functional groups is selected from the group consisting of--NH2,--X (where X represents a halogen atom),--SH,--OH,--OSO2CH3, and--OSO 2(C6H4)CH3. 31. A method of manufacturing a gas decomposing unit according to claim 29, wherein the base is selected from the group consisting of sodium hydroxide, potassium hydroxide, pyridine, and sodium ethoxide. 32. A method of manufacturing a gas decomposing unit according to claim 23, wherein the reaction comprises an addition reaction. 33. A method of manufacturing a gas decomposing unit according to claim 32, wherein each of the functional groups is chosen from the group consisting of--OH and--NCO. 34. A method of manufacturing a gas decomposing unit according to claim 23, wherein the reaction comprises an oxidative reaction. 35. A method of manufacturing a gas decomposing unit according to claim 34, wherein each of the functional groups comprises--SH. 36. A method of manufacturing a gas decomposing unit according to claim 34, wherein the solution further contains an oxidative reaction accelerator. 37. A method of manufacturing a gas decomposing unit according to claim 36, wherein the oxidative reaction accelerator comprises iodine.
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