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US 10,501,321 B2Granted
Nitride stabilized core/shell nanoparticles
AssigneeBrookhaven Science Associates, LLC
InventorsKurian Abraham Kuttiyiel, Kotaro Sasaki, Radoslav R. Adzic
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Abstract
Nitride stabilized metal nanoparticles and methods for their manufacture are disclosed. In one embodiment the metal nanoparticles have a continuous and nonporous noble metal shell with a nitride-stabilized non-noble metal core. The nitride-stabilized core provides a stabilizing effect under high oxidizing conditions suppressing the noble metal dissolution during potential cycling.
Claims20
A method of forming nitride stabilized nanoparticles comprising,
- a non-noble metal solid solution core with a size of less than 100 nm along at least one of three orthogonal axes, and
- a continuous and nonporous noble metal shell surrounding the non-noble metal solid solution core;
- wherein the non-noble metal solid solution core comprises a nitride of a non-noble metal selected from the group consisting of nickel (Ni) nitride, cobalt (Co) nitride, iron (Fe) nitride, copper (Cu) nitride and mixtures thereof;
- formed by:
- preparing a mixture comprising an organic solvent, a salt of a first metal, and a salt of a second metal;
- evaporating the organic solvent from the mixture to leave a dry powder;
- and
- annealing the dry powder under a nitrogen source to produce a nitride of the first metal.
5 more elements
Dependencies are inferred from the claim text.