Back to results
US 9,425,462 B2Granted
Preparation of hollow Pt and Pt-alloy catalysts
AssigneeGM Global Technology Operations LLC
InventorAnusorn Kongkanand
Life of this patent
Estimating the term…
Abstract
A method for preparing hollow platinum or platinum-alloy catalysts includes a step of forming a plurality of low-melting-point metal nanoparticles. A platinum or platinum-alloy coating is then deposited onto the low-melting-point metal nanoparticles to form platinum or platinum-alloy coated particles. The low-melting-point metal nanoparticles are then removed to form a plurality of hollow platinum or platinum-alloy particles.
Claims21
A method for preparing hollow platinum or platinum-alloy catalysts, the method comprising:
- forming a plurality of low-melting-point core metal nanoparticles in a non-aqueous solvent absent of oxygen;
- depositing platinum or platinum-alloy onto the low-melting-point core metal nanoparticles to form a shell of platinum or platinum-alloy coating the low-melting-point core metal nanoparticles;
- and
- removing the low-melting-point core metal nanoparticles from the platinum or platinum-alloy coated particles by melting to form a plurality of hollow platinum or platinum-alloy particles wherein a room-temperature-ionic liquid is used as a medium when depositing platinum or platinum-alloy onto the low-melting-point core metal nanoparticles or melting the low-melting-point core metal nanoparticles or annealing the shell to improve its catalytic activity.
1 more element
Dependencies are inferred from the claim text.