Porous metals from sintering of nanoparticles
| DWPI Title: Method for forming nanoporous metal e.g. palladium-rhodium alloy, involves introducing metal salt to solution comprising dendrimer, and sintering or partially consolidating metallic nanoparticle mass by modifying solution concomitantly |
| Abstract: A method including encapsulating or capping metallic nanoparticles by a dendrimer or a polymer with binding sites for metal particless or metal ions dispersed in a fluid; modifying the fluid to disrupt the interaction of the dendrimer or polymer with the particles; and subsequently or concomitantly sintering or partially consolidating the zero valent metal. A method including introducing a first metal salt and a second metal salt into a dendrimer or a polymer with binding sites for metals or metal ions; reducing a metal ion of the first metal salt to a zero valent first metal and a metal ion of the second metal salt to a zero valend second metal; disrupting an interaction between the dendrimer or the polymer and the first metal and the second metal; and sintering or partially consolidating the first metal and the second metal. |
| Use: Method for forming a nanoporous metal i.e. palladium-rhodium alloy. |
| Advantage: The method ensures that rhodium salt is reduced to a zero valent rhodium by a reducing agent that is different from another reducing agent so as to reduce palladium, and high surface area to metal volume ratios exhibited by nanoporous palladium mitigates a formation of destructive, high-pressure helium bubbles from a decay of tritium stored in palladium lattices in a reliable manner. |
| Novelty: The method involves introducing a metal salt to a solution comprising a dendrimer with binding sites for metals or metal ions. The metal salt is reduced to zero valent metal to form dendrimer encapsulated metallic nanoparticles. The solution is modified with a modification agent to disrupt an interaction of the dendrimer with the metallic nanoparticles. A metallic nanoparticle mass is sintered or partially consolidated by modifying the solution concomitantly. A first metal salt and a different second metal salt are introduced. |
| Filed: 6/14/2013 |
| Application Number: US13917762A |
| Tech ID: SD 12109.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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