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US 2016/0104899 A1Published application
Non-carbon mixed-metal oxide electrocatalysts
AssigneeNissan North America, Inc.
InventorsNilesh Dale, Ellazar 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.
Claims15
A method of preparing an electrocatalyst comprising:
- preparing non-carbon composite support particles comprising:
- dispersing titanium dioxide in liquid and mixing;
- depositing ruthenium nanoparticles onto the titanium dioxide in the liquid using a ruthenium precursor, wherein the titanium dioxide has a first particle size and the ruthenium nanoparticles have a second particle size, the first particle size being greater than the second particle size;
- agglomerating ruthenium nanoparticles with the deposited ruthenium nanoparticles to produce an agglomerated ruthenium particle with a particle size that approximates the first particle size;
- and
- oxidizing the agglomerated ruthenium nanoparticle to obtain ruthenium dioxide;
- and
- depositing active catalyst particles on the non-carbon composite support particles.
5 more elements
A method of preparing an electrocatalyst comprising:
- preparing a non-carbon composite support particle comprising:
- oxidizing ruthenium nanoparticles to obtain ruthenium dioxide;
- and
- reducing a titanium precursor and depositing titanium nanoparticles onto the ruthenium dioxide in a liquid, wherein the ruthenium dioxide has a first particle size and the titanium nanoparticles have a second particle size, the first particle size being greater than the second particle size;
- agglomerating titanium nanoparticles with the deposited titanium nanoparticles to produce an agglomerated titanium particle with a particle size that approximates the first particle size;
- oxidizing the aggregated titanium particle to form titanium oxide;
- and
- depositing active catalyst particles on the non-carbon composite support particles.
5 more elements
Dependencies are inferred from the claim text.