Systems and methods for ptni nanocages
AssigneeUchicago Argonne, LLC
InventorsVojislav Stamenkovic, Gregory K. Krumdick, Rongyue Wang, Nenad Markovic, Krzysztof Pupek, Trevor L. Dzwiniel
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Abstract
A method for synthesis of PtNi nanocages by synthesizing Pt1Ni6 nanoparticles and acid leaching to form PtNi nanocages. The acid leaching removes nickel selectively from the core of the nanoparticle.
Claims20
A method of synthesizing PtNi nanocage catalyst comprising the steps of:
- synthesizing Pt1Ni6 nanoparticles having a Pt shell and a Ni core by:
- mixing a nickel precursor, a surfactant, a platinum precursor, and a polar solvent at a temperature of at least 230° C. forming a Pt1Ni6 nanoparticle solution;
- acid leaching the Pt1Ni6 nanoparticles by:
- mixing an acid with the Pt1Ni6 nanoparticle a temperature above 80° C.;
- removing Ni from the nanoparticles to form nanocages;
- and
- collecting the nanocages.
The method of claim 3, wherein the surfactant comprises oleic acid and oleylamine.
The method of claim 4, wherein the platinum precursor comprises Pt (II) acetylacetaonate, and the polar solvent comprises 1,2,-dichlorobenzene.
A method of synthesizing PtNi nanocage catalyst comprising the steps of:
- synthesizing Pt1Ni6 nanoparticles having a Pt shell and a Ni core by:
- mixing a nickel precursor, a surfactant, a platinum precursor, and a polar solvent to form a reaction solution, the ratio of nickel precursor to platinum precursor being 10:90 to 40:60;
- holding the solution at a temperature of at least at a temperature of at least 110° C. to remove dissolved oxygen;
- heating the solution to at least 230° C. for at least 30 minutes and forming a Pt1Ni6 nanoparticle solution;
- acid leaching the Pt1Ni6 nanoparticles by:
- mixing an acid with the Pt1Ni6 nanoparticle solution at temperature above 80° C.;
- removing Ni from the nanoparticles to form nanocages;
- and
- collecting the nanocages.
Dependencies are inferred from the claim text.