Palladium and platinum-based nanoparticle functional sensor layers and integration with engineered filter layers for selective H2 sensing

Patent · Tue Jul 09 00:00:00 EDT 2019

OSTI ID:1568575

Ohodnicki, Jr., Paul R.; Sun, Chenhu; Baltrus, John P.; Brown, Thomas D.

The disclosure relates to a method for H2 sensing in a gas stream utilizing a hydrogen sensing material. The hydrogen sensing material is comprised of Pd-based or Pt-based nanoparticles having an average nanoparticle diameter of less than about 100 nanometers dispersed in an inert matrix having a bandgap greater than or equal to 5 eV, and an oxygen ion conductivity less than approximately 10−7 S/cm at a temperature of 700° C. Exemplary inert matrix materials include SiO2, Al2O3, and Si3N4 as well as modifications to modify the effective refractive indices through combinations and/or doping of such materials. Additional exemplary matrix materials consist of zeolitic and zeolite-derivative structures which are microporous and/or nanoporous such as the alumino-silicates and the dealuminated zeolite NaA structures. Additional sensing layers may be comprised of (1) a single “nanocomposite” layer comprised of Pd- or Pt-based particles dispersed within an inert matrix, (2) multi-layered sensing layers comprised of a nanocomposite layer with a filter overlayer, (3) core-shell layers comprised of matrix materials surrounding a core of Pd-based or Pt-based nanoparticles, and any combinations of the above.

• Research Organization: US Department of Energy (USDOE), Washington, DC (United States)
• Sponsoring Organization: USDOE
• Assignee: U.S. Department of Energy (Washington, DC)
• Patent Number(s): 10,345,279
• Application Number: 15/641,193
• OSTI ID: 1568575
• Resource Relation: Patent File Date: 07/03/2017
• Country of Publication: United States
• Language: English