Polymer-stabilized metal colloid solutions, method for producing said solutions and use of the same as catalysts for fuel cell
AssigneeAxiva GmbH
InventorsHarald Bönsel, Gregor Deckers, Georg Frank, Hans Millauer, Thomas Soczka-Guth
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Abstract
Polymer-stabilized metal colloid solutions, process for preparing them and their use as catalysts for fuel cells. Process for preparing metal colloid solutions by reacting a platinum compound and, if desired, one or more compounds of Rh, Ru, Ir or Pd with a reducing agent. At least one cation-exchange polymer is used for stabilizing the metal colloid solution.
Claims16
A process for preparing metal colloid solutions by reacting a platinum compound and, if desired, one or more compounds of Rh, Ru, Ir or Pd with a reducing agent, wherein at least one cation-exchange polymer selected from the group consisting of:
- sulfonated polyaryl ether ketones, sulfonated polyether sulfones, sulfonated polyphenylene sulfides and sulfonated acrylonitrile-butadiene-styrene copolymers (ABS) poly(α,β,γ-trifluorostyrene-sulfonic acids) and poly(polyfluoroethylene-co-2-(1-methyl-2-vinyloxyethoxy)ethane sulfonic acid) is used for stabilizing the metal colloid solution.
A water-soluble metal colloid comprising one or more platinum compounds and, if desired, one or more compounds of Rh, Ru, Ir or Pd, wherein the metal colloid is stabilized by a cation-exchange polymer, selected from the group consisting of:
- sulfonated polyaryl ether ketones, sulfonated polyether sulfones, sulfonated polyphenylene sulfides, sulfonated acrylonitrile-butadiene-styrene copolymers (ABS), poly(α,β,γ-trifluorostyrene-sulfonic acids), and poly(perfluoroethylene-co-2-(-1-methyl-2-vinyloxyethoxy)ethanesulfonic acid).
Dependencies are inferred from the claim text.