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US 9,543,591 B2Granted
Non-carbon mixed-metal oxide electrocatalysts
AssigneeNissan North America, Inc.
InventorsNilesh Dale, Ellazar V. Niangar, Taehee Han, Kan Huang, Gregory DiLeo
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Abstract
Electrocatalysts having non-corrosive, non-carbon support particles are provided as well as the method of making the electrocatalysts and the non-corrosive, non-carbon support particles. Embodiments of the non-corrosive, non-carbon support particle consists essentially of titanium dioxide and ruthenium dioxide. The electrocatalyst can be used in fuel cells, for example.
Claims9
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.
5 more elements
Dependencies are inferred from the claim text.