Compositions comprising functionalized carbon-based nanostructures and related methods

Patent metadata

Field	Value
Publication number	US-9770709-B2
Application number	US-201514670232-A
Country	US
Kind code	B2
Filing date	Mar 26, 2015
Priority date	Nov 3, 2010
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

The present invention generally relates to compositions comprising and methods for forming functionalized carbon-based nanostructures.

First claim

What is claimed:

1. A catalyst composition for oxidation of carbon monoxide, comprising:
a graphene or graphene oxide molecule comprising at least one functional group having the structure:

wherein:
R 1 , R 2 , and R 3 are the same or different and each is independently a substituent, optionally substituted, wherein at least one of R 1 , R 2 , and R 3 comprises a catalytic moiety capable of oxidizing carbon monoxide to carbon dioxide; and
G is a carbon atom of the graphene or graphene oxide.

2. A catalyst composition as in claim 1 , wherein the catalytic moiety comprises a metal.

3. A catalyst composition as in claim 1 , wherein the catalytic moiety comprises Pd, Fe, Ce, Al, Cu, or Ti, or an oxide thereof.

4. A catalyst composition as in claim 1 , wherein the catalytic moiety comprises Pd nanoclusters, Fe 2 O 3 , FeOOH, or TiOOH.

5. A catalyst composition as in claim 2 , wherein at least one of R 1 , R 2 , and R 3 is capable of binding a metal.

6. A catalyst composition as in claim 5 , wherein at least one of R 1 , R 2 , and R 3 comprises nitrogen, sulfur, or phosphorus.

7. A catalyst composition as in claim 5 , wherein at least one of R 1 , R 2 , and R 3 comprises a positively or a negatively charged group.

8. A catalyst composition as in claim 1 , wherein the catalytic moiety is capable of reducing oxygen.

9. A catalyst composition as in claim 1 , wherein the catalytic moiety is capable of reducing nitric oxide.

10. A catalyst composition as in claim 1 , wherein:
R 3 is hydrogen, alkyl, aryl, alkenyl, cycloalkyl, heteroalkyl, heteroaryl, N(R 4 ) 2 , SR 4 , Si(R 4 ) 2 , OR 4 , or OM, any of which is optionally substituted,
M is a metal or cationic species; and
each R 4 is independently a substituent, optionally substituted.

11. A catalyst composition as in claim 10 , wherein:
R 3 is aryl, heteroalkyl, heteroaryl, N(R 4 ) 2 , SR 4 , Si(R 4 ) 2 , OR 4 , or OM, any of which is optionally substituted,
M is a metal; and
each R 4 is independently a substituent, optionally substituted.

12. A catalyst composition as in claim 11 , wherein each R 4 is independently hydrogen, an organic substituent, or a metal-containing substituent, optionally substituted.

13. A catalyst composition as in claim 10 , wherein R 3 is OR 4 or N(R 4 ) 2 .

14. A catalyst composition as in claim 10 , wherein each R 4 is the same or different and each is independently hydrogen, alkyl, cycloalkyl, haloalkyl, heteroalkyl, aryl, heteroaryl, or OH, any of which is optionally substituted.

15. A catalyst composition as in claim 10 , wherein R 3 is N(CH 3 ) 2 , NH-phenyl, NH-biphenyl, NHCH 2 (C≡CH), OH, OMe, OEt, OM, where M is a metal ion, OCH 2 (C≡CH), OCH 2 CH 2 (2-bromophenyl), OCH 2 (adamantyl), or OCH 2 C(4-chlorophenyl) 3 .

16. A catalyst composition as in claim 10 , wherein R 4 is alkyl substituted with an unsubstituted or substituted aryl or an unsubstituted or substituted cycloalkyl.

17. A catalyst composition as in claim 10 , wherein:
R 1 and R 2 are the same or different and each is independently hydrogen, alkyl, heteroalkyl, cycloalkyl, alkenyl, or aryl, any of which is optionally substituted.

18. A catalyst composition as in claim 17 , wherein R 1 and R 2 are both hydrogen.

Assignees

• Massachusetts Inst Technology

Inventors

• Swager Timothy M
• Collins William R
• Lewandowski Wiktor
• Schmois Ezequiel
• Sydlik Stefanie
• Walish Joseph
• Goods John B

Classifications

• H01G11/36

  Nanostructures, e.g. nanofibres, nanotubes or fullerenes · CPC title

• C01B32/174

  Derivatisation; Solubilisation; Dispersion in solvents · CPC title

• C07F7/28

  Titanium compounds · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title

• C01B32/194

  After-treatment · CPC title