Ultrathin, ternary alloy PtRuFe nanowires, and methods of making same

Patent metadata

Field	Value
Publication number	US-10804543-B2
Application number	US-201615092530-A
Country	US
Kind code	B2
Filing date	Apr 6, 2016
Priority date	Apr 6, 2015
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

The present invention provides a method of producing ternary metal-based nanowire networks. The method comprises combining an aqueous mixture of a platinum hydrate, a ruthenium hydrate, and an iron hydrate with a solution of hexadecyltrimethylammonium bromide in chloroform to form an inverse micellar network; adding a reducing agent to reduce metal ions within the inverse micellar network; and isolating the nanowires. The relative amounts of the platinum, ruthenium and iron in the mixture correlate to the atomic ratio of the platinum, ruthenium and iron in the ternary nanowires. The diameters of the ternary nanowires are from about 0.5 nm to about 5 nm.

First claim

The invention claimed is:

1. A method of producing ternary metal-based nanowire networks, the method comprising:
combining an aqueous mixture of a platinum hydrate, a ruthenium hydrate, and an iron hydrate with a solution of hexadecyltrimethylammonium bromide in chloroform to form an inverse micellar network;
adding a reducing agent to reduce metal ions within the inverse micellar network; and
isolating the nanowires,

wherein the nanowires are homogeneous alloys, wherein the relative amount of the platinum, ruthenium and iron in the mixture correlate to the atomic ratio of the platinum, ruthenium and iron in the ternary nanowires, wherein the diameters of the ternary nanowires are from about 0.5 nm to about 5 nm.

2. The method of claim 1 , wherein the formula of the nanowires is Pt 7 Ru 2 Fe, Pt 7 Ru 1.5 Fe 1.5 , Pt 7 RuFe 2 , or Pt 7 Ru 0.5 Fe 2.5 .

3. The method of claim 1 wherein the platinum hydrate is hexachloroplatinic acid hydrate (H 2 PtCl 6.6 H 2 O).

4. The method of claim 1 wherein the ruthenium hydrate is ruthenium(III) chloride hydrate (RuCl 3 .xH 2 O).

5. The method of claim 1 wherein the iron hydrate is iron(III) nitrate nonahydrate (Fe(NO 3 ) 3 .9H 2 O).

6. The method of claim 1 wherein the reducing agent is sodium borohydride (NaBH 4 ).

7. The method according to claim 1 wherein the diameters of the ternary nanowires are less than about 2 nm.

Assignees

• Univ New York State Res Found

Inventors

• Wong Stanislaus
• Koenigsmann Christopher
• Scofield Megan

Classifications

• H01M4/921 Primary

  Alloys or mixtures with metallic elements · CPC title

• H01M4/928

  Unsupported catalytic particles; loose particulate catalytic materials, e.g. in fluidised state · CPC title

• Y02E60/50

  Fuel cells · CPC title

• Y10S977/932

  for electronic or optoelectronic application · CPC title

• H01M8/1011

  Direct alcohol fuel cells [DAFC], e.g. direct methanol fuel cells [DMFC] · CPC title