Patent · US Active

Catalyst particles comprising hollow multilayered base metal-precious metal core/shell particles and method of their manufacture

US9440224B2 · kind B2 · utility

2Cited by

7References

23Claims

0Family size

Assignee

UMICORE AG & CO. KG · DE

Inventors

Dan V. Goia · Potsdam, US
Igor V. Sevonkaev · Potsdam, US
Daniel Herein · Frankfurt, DE

Key dates

Filing date	Dec 18, 2012
Grant date	Sep 13, 2016
Priority date	—
Expiry date	Feb 14, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S977/892
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention is directed to hollow catalyst particles comprising a layered shell structure and to a method of their manufacture. The catalyst particles have the general formula Hcore/PMinner shell/IL/PMouter shell in which Hcore is the hollow core, PMinner shell is a precious metal forming the innermost layer of the shell, IL is an intermediate layer comprising a base metal/precious metal alloy, and PMouter shell is a precious metal forming the outermost layer of the shell. The precious metal is selected from Pt, Ir and Pd and mixtures or alloys thereof, and IL is an intermediate layer comprising a base metal/precious metal alloy wherein the concentration of the base metal changes from the periphery of the hollow core to the outer surface of the intermediate layer. The base metal is selected from Co, Ni, and Cu and mixtures thereof.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.