Multimetallic core/interlayer/shell nanoparticles

Patent metadata

Field	Value
Publication number	US-10099207-B2
Application number	US-201514677707-A
Country	US
Kind code	B2
Filing date	Apr 2, 2015
Priority date	Apr 2, 2015
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A multimetallic core/interlayer/shell nanoparticle comprises an inner core formed from a first metal. An interlayer is disposed on the first layer. The interlayer includes a plurality of gold atoms. An outer shell is disposed over the interlayer. The outer shell includes platinum and the first metal. A surface of the NP is substantially free of gold. The first metal is selected from the group consisting of nickel, titanium, chromium, manganese, iron, cobalt, copper, vanadium, yttrium, ruthenium, palladium, scandium, tin, lead and zinc.

First claim

What is claimed is:

1. A catalyst, comprising:
an electrically conducting substrate;
a plurality of nanoparticles disposed within the electrically conducting substrate, the nanoparticles comprising:
an inner core consisting of nickel,
an interlayer disposed on the inner core, the interlayer consisting of a plurality of gold atoms, and
an outer shell disposed over the interlayer, the outer shell consisting of platinum and nickel,
wherein, a surface of the nanoparticles is free of gold,
wherein an amount of gold in the nanoparticle is in a range of 5 atom % to 28 atom %.

2. The catalyst of claim 1 , wherein the electrically conducting substrate comprises carbon.

3. The catalyst of claim 1 , wherein the inner core has a diameter in the range of 2.5 nm to 3.5 nm.

4. The catalyst of claim 3 , wherein the interlayer has a thickness in the range of 0.5 nm to 2 nm.

5. The catalyst of claim 4 , wherein the outer shell has a thickness in the range of 0.5 nm to 2 nm.

6. The catalyst of claim 1 , wherein the catalyst retains greater than 90% of a catalytic activity of the catalyst after 10,000 potential cycles.

Assignees

• Uchicago Argonne Llc

Inventors

• Stamenkovic Vojislav
• Markovic Nenad
• Kang Yijin

Classifications

• H01M4/8657

  layered · CPC title

• B01J35/008

  Operations & Transport · mapped topic

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• B01J37/0211

  using a colloidal suspension · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title