Nanofibers Functionalized with Platinum Catalysts

Nanofibers functionalized with platinum catalysts

Platinum Applications

Platinum is the standard platinum metal group (PGM) that exhibits exceptional corrosion resistance even at high temperatures. Platinum is commonly available in various forms of oxides, and has the unique ability to function as both an oxidative and reductive catalyst. Platinum compounds are commonly used in the chemical industry as a catalyst and within catalytic convertors (largest usage). It is also used extensively in the petroleum industry with the most common process being the reforming of naphthas into high-octane gasolines. Other applications for platinum include electrical components, laboratory equipment, and medicine production.

Properties

MemPro’s nanofibers functionalized with platinum catalysts consist of a base aluminum oxide (Al2O3) nanofibers incorporated with nanoparticles of platinum(II) oxide or as platinum metal. Our unique manufacturing process produces nanofibers with uniform dispersion of platinum or platinum(II) oxide nanoparticles on the interior and exterior surfaces of Al2O3 fibers. Analysis of the platinum and platinum(II) oxide nanoparticles reveals very consistent diameters (geometric size) within a range of 2 to 8 nm.

MemPro’s nanofibers are also available with platinum, rhodium, and palladium noble metals incorporated within a single nanofiber support material, manufactured to meet customer specifications.

Platinum functionalized nanofiber materials are made to our customers’ specifications, according to their catalyst loading and base material requirements. Please contact us to order this product.

 

Characteristic Value
Appearance fibrous, non-woven,whitish-grey flake-like material
Structure Al2O3 crystalline nanofiber material (gamma- or alpha- phase) with supported Pt/PtO nanoparticulates
Density Al2O3 nanofibers: 4 gcm-3, platinum nanoparticles: 8.3-21.45 gcm-3, bulk: 0.1 gcm-3
Surface area Al2O3 nanofibers: 150 – 200 m2g-1, platinum nanoparticles: m2g-1
Melting Point Al2O3 nanofibers: 2072°C, platinum nanoparticles: 325°C PtO (decomposes) and 1,770°C Pt
Thermal Conductivity Al2O3 nanofibers: 30 Wm-1K-1, platinum nanoparticles: 71.6 Wm-1K-1 , bulk: NA
Electrical Conductivity Al2O3 nanofibers: < 10-14 Sm-1
Dielectric Strength Al2O3 nanofibers: 13.4 MVm-1
Hardness Al2O3 nanofibers: 9 (Mohs)
Fiber diameter 90 – 120 nm (ave.)
Fiber length >5 µm
Refractive Index Al2O3 nanofibers: 1.74926 (λ=1.36 µm)
Other high chemical resistance, catalytically active, insoluble in water

Platinum(II) oxide and to much extensively, platinum metal, are used in a wide variety of catalytic processes for chemical production (bulk and fine) and exhaust treatment. Although utilized in other non-catalytic products such as high-efficiency electrodes, anit-cancer drugs, oxygen sensors, and new turbine engines, over 55% of annual usage is in catalytic converters for motor vehicle exhaust treatment with almost an additional 10% used in chemical processing.

MemPro’s unique manufacturing process functionalizes ceramic nanofibers (typically Al2O3 or Cex Zr1-x O2, and TiO2 upon request) with a uniform, well-dispersed platinum(II) oxide (or platinum metal nanoparticles) on the exposed surfaces and within individual fiber matrices. Depending on the ceramic nanofiber base material, products can be tailored to meet specific customer needs. Some specific catalytic applications of platinum functionalized nanofibers include:

  • motor vehicle exhaust treatment (catalytic converters)
  • hydrogen fuel cells
  • hydrogenation, hydrolgenolysis, and organic synthesis reactions
  • ammonia oxidation
  • reductive alkylations
  • coupling reactions

For more information on palladium-based catalyst products, please view the material data safety sheets and specification sheets in PDF format.

Spec sheet: ceramic nanofibers functionalized with platinum
MSDS: Al2O3/Pt/PtO material data safety sheet


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