Metal-coated articles comprising a transition metal region and a platinum-group metal region and related methods

Patent metadata

Field	Value
Publication number	US-2024076793-A1
Application number	US-202318459966-A
Country	US
Kind code	A1
Filing date	Sep 1, 2023
Priority date	Sep 2, 2022
Publication date	Mar 7, 2024
Grant date	—

Abstract

A metal-coated article that comprises a substrate, a transition metal region adjacent to the substrate, and a platinum-group metal region adjacent to the transition metal region. The transition metal region comprises a transition metal carbide layer adjacent to the substrate. The platinum-group metal region comprises a transition metal/platinum-group metal layer that is adjacent to the transition metal region and a platinum-group metal layer adjacent to the transition metal/platinum-group metal layer. Related methods are also disclosed.

First claim

What is claimed is:

1 . A metal-coated article, comprising:
a substrate; a transition metal region adjacent to the substrate, the transition metal region comprising:
a transition metal carbide layer adjacent to the substrate; and
a platinum-group metal region adjacent to the transition metal region, the platinum-group metal region comprising:
a transition metal/platinum-group metal layer adjacent to the transition metal region; and
a metal layer adjacent to the transition metal/platinum-group metal layer.

2 . The metal-coated article of claim 1 , wherein the transition metal region further comprises a transition metal layer adjacent to the transition metal carbide layer.

3 . The metal-coated article of claim 2 , wherein the transition metal carbide layer directly contacts the substrate and the transition metal layer.

4 . The metal-coated article of claim 2 , wherein the transition metal/platinum-group metal layer directly contacts the transition metal layer and the platinum-group metal layer.

5 . The metal-coated article of claim 1 , wherein the substrate comprises a carbon- based material.

6 . The metal-coated article of claim 1 , wherein the transition metal in the transition metal region comprises nickel, chromium, tantalum, titanium, niobium, tungsten, or molybdenum.

7 . The metal-coated article of claim 1 , wherein the platinum-group metal in the platinum-group metal region comprises ruthenium or osmium.

8 . The metal-coated article of claim 1 , wherein the combination of the transition metal in the transition metal region and platinum-group metal in the platinum-group metal region comprises titanium/ruthenium, molybdenum/ruthenium, or tantalum/ruthenium.

9 . The metal-coated article of claim 1 , wherein the platinum-group metal layer comprises more than one layer of platinum-group metals.

10 . The metal-coated article of claim 9 , wherein one or more layers of the more than one layers of platinum-group metals comprises a different platinum-group metal.

11 . A method of forming a metal-coated article, comprising:
electrodepositing a transition metal layer onto a substrate; and converting at least a portion of the transition metal layer to a transition metal carbide layer to form a transition metal region; electrodepositing a platinum-group metal layer on the transition metal region; and converting at least a portion of the platinum-group metal layer to a transition metal/platinum-group metal layer on the platinum-group metal layer to form a platinum-group metal region.

12 . The method of claim 11 , wherein electrodepositing a transition metal layer onto a substrate comprises electrodepositing the transition metal layer at a temperature in a range of from about 350° C. to about 500° C.

13 . The method of claim 12 , wherein electrodepositing a transition metal layer onto a substrate comprises electrodepositing the transition metal layer from an electrolyte comprising LiBr, KBr, and CsBr.

14 . The method of claim 11 , wherein electrodepositing a platinum-group metal layer onto the transition metal region comprises electrodepositing the platinum-group metal layer from an alkali halide salt electrolyte at a temperature in a range of from about 350° C. to about 500° C.

15 . The method of claim 14 , wherein electrodepositing the platinum-group metal layer from an alkali halide salt electrolyte comprises electrodepositing the platinum-group metal layer from an electrolyte comprising LiBr, KBr, and CsBr.

16 . The method of claim 11 , wherein converting at least a portion of the transition metal layer to a transition metal carbide layer comprises annealing the substrate and the transition metal layer at a temperature from about 500° C. to about 600° C.

17 . The method of claim 11 , wherein converting at least a portion of the platinum-group metal layer to a transition metal/platinum-group metal layer comprises annealing the transition metal region and the platinum-group metal layer at a temperature from about 500° C. to about 600° C.

18 . A method of forming a metal-coated article, comprising:
forming an as deposited transition metal layer on a substrate; annealing the as deposited transition metal layer to convert at least a portion of the as deposited transition metal layer to a transition metal carbide layer; forming an as deposited platinum-group metal layer on the transition metal carbide layer; and annealing the as deposited platinum-group metal layer to convert at least a portion of the as deposited platinum-group metal layer to a transition metal/platinum-group metal layer.

19 . The method of claim 18 , wherein annealing the as deposited transition metal layer to convert at least a portion of the as deposited transition metal layer comprises converting substantially all of the as deposited transition metal layer to the transition metal carbide layer.

20 . The method of claim 18 , wherein annealing the as deposited platinum-group metal layer to convert at least a portion of the as deposited platinum-group metal layer to a transition metal/platinum-group metal layer comprises forming the platinum-group metal layer and a platinum-group metal layer.

Assignees

• Battelle Energy Alliance Llc

Inventors

• Tripathy Prabhat K

Classifications

• C25D3/50

  of platinum group metals · CPC title

• C25D5/10 Primary

  Electroplating with more than one layer of the same or of different metals (for bearings C25D7/10) · CPC title

• C25D3/665

  from ionic liquids · CPC title

• C25D5/50

  by heat-treatment · CPC title