Patent ID: 9543591
Date: 2017-01-10
CPC Classifications: H01M,Y02E,Y02T

Claim:
1. A method of preparing an electrocatalyst comprising: preparing non-carbon composite support particles comprising: oxidizing ruthenium nanoparticles to obtain ruthenium dioxide nanoparticles; and reducing a titanium precursor and depositing titanium nanoparticles onto the ruthenium dioxide nanoparticles in a liquid, wherein each of the ruthenium dioxide nanoparticles has a first particle size and each of the titanium nanoparticles has a second particle size, the first particle size being greater than the second particle size, wherein the first particle size is greater than 10 and less than or equal to 40 nanometers and the second particle size is greater than or equal to 5 and 10 nanometers; agglomerating titanium nanoparticles to produce agglomerated titanium particles with a particle size that is the same as the first particle size deposited on the ruthenium dioxide nanoparticles; and oxidizing the agglomerated titanium particles to form titanium oxide nanoparticles; and depositing active catalyst particles on the non-carbon composite support particles.