High activity Pt—Bi catalyst for dimethyl ether electro-oxidation
US10418641B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 16, 2016 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Jul 4, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided are processes for preparing a thermodynamically stable PtBi2 alloy nanoparticle. In certain aspects, the process comprises preparing an aqueous mixture, with the aqueous mixture comprising: an inorganic compound comprising SnCl2; an inorganic compound comprising Bi; and HCl. The process further comprises adding PtCl4 to the mixture. The process results in the spontaneous reduction of Bi and Pt. Excess SnCl2 is adsorbed as a ligand at the surface of the PtBi2 alloy nanoparticle, which serves to stabilize the nanoparticle. Another aspect provides a thermodynamically stable PtBi2 nanoparticle. The nanoparticle comprises a core comprising a PtBi2 alloy. The nanoparticle further comprises a shell at least partially encapsulating the core, with the shell comprising stannous chloride. The thermodynamically stable PtBi2 nanoparticle has a negative charge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.