Methods to synthesize NiPt bimetallic nanoparticles by a reversed-phase microemulsion, deposition of NiPt bimetallic nanoparticles on a support, and application of the supported catalyst for CO2 reforming of methane

Patent metadata

Field	Value
Publication number	US-9017576-B2
Application number	US-201314047211-A
Country	US
Kind code	B2
Filing date	Oct 7, 2013
Priority date	Oct 8, 2012
Publication date	Apr 28, 2015
Grant date	Apr 28, 2015

Abstract

Embodiments of the present disclosure provide for NiPt nanoparticles, compositions and supports including NiPt nanoparticles, methods of making NiPt nanoparticles, methods of supporting NiPt nanoparticles, methods of using NiPt nanoparticles, and the like.

First claim

We claim at least the following:

1. A particle, comprising:
Ni x Pt y nanoparticles having an average size of about 1.5 to 3 nm, wherein x is about 0.85 to 0.95 and y is about 0.05 to 0.15.

2. The particle of claim 1 , wherein the average size is about 1.9 to 2.5 nm.

3. The particle of claim 1 , wherein x is about 0.9 and y is about 0.1.

4. The particle of claim 1 , wherein the particle is included in a composition.

5. The particle of claim 1 , wherein the particle is a functional nanomaterial.

6. A method of making a nanoparticle, comprising:
mixing a first microemulsion solution with a second microemulsion solution, wherein the first microemulsion solution includes a nickel precursor, a platinum precursor, and water, wherein the second microemulsion solution includes a reducing agent, a precipitating agent, and water;
cooling the mixture while mixing; and
forming Ni x Pt y nanoparticles having an average size of about 1.5 to 3 nm, wherein x is about 0.85 to 0.95 and y is about 0.05 to 0.15.

7. The method of claim 6 , wherein platinum precursor and the nickel precursor have a molar ratio of about 2:98 to 50:50.

8. The method of claim 6 , wherein the molar ratio of metals/reducing agent/precipitating agent is about 1:12:5 to 1:6:1.

9. The method of claim 6 , wherein the first microemulsion solution and the second microemulsion solution are optically transparent.

10. The method of claim 6 , wherein the first microemulsion solution and the second microemulsion solution contain polyoxyethylene ( 5 ) nonylphenylether, water and cyclohexane in a molar ratio of about 1:5:125.

11. The method of claim 6 , wherein the reducing agent is hydrazine.

12. The method of claim 6 , wherein the precipitating agent is ammonium hydroxide.

13. The method of claim 6 , wherein the platinum precursor is platinum (IV) chloride.

14. The method of claim 6 , wherein the nickel precursor is nickel nitrate hexahydrate.

15. The method of claim 6 , further comprising:
mixing a support in a deposition solvent to form a second mixture;
disposing the mixture in the second mixture to form a third;
heating the third mixture at 80° C. under reflux;
recovering a solid from the third mixture; and
calcining the solid to form a nanoparticle material.

16. The method of claim 15 , wherein the deposition solvent is both soluble in water and hydrophobic organic solvents.

17. The method of claim 15 , where the volume ratio of deposition solvent to microemulsion is about 1 to 10.

18. The method of claim 15 , where the support is an inorganic material selected from the group consisting of: Al 2 O 3 , Ce 2 O 3 , ZrO 2 , and activated carbon.

19. A composition, comprising: Ni x Pt y nanoparticle disposed on a support, wherein the Ni x Pt y nanoparticles have an average size of about 1.5 to 3 nm, wherein x is about 0.85 to 0.95 and y is about 0.05 to 0.15.

20. The composition of claim 19 , wherein the support is selected from the group consisting of: alumina, silica, titania, and activated carbon.

21. The composition of claim 19 , wherein the support is γ-Al 2 O 3 .

22. A method, comprising:
CO 2 reforming of methane using supported Ni x Pt y nanoparticle material, wherein the Ni x Pt y nanoparticles have an average size of about 1.5 to 3 nm, wherein x is about 0.85 to 0.95 and y is about 0.05 to 0.15.

Assignees

• King Abdullah University Of Science And Technology Kaust
• Univ King Abdullah Sci & Tech

Inventors

• Biausque Gregory
• Laveille Paco
• Anjum Dalaver H
• Caps Valerie
• Basset Jean-Marie

Classifications

• B22F1/054

  Nanosized particles · CPC title

• B01J2235/15

  X-ray diffraction · CPC title

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J35/45

  Nanoparticles · CPC title