Hydrous phosphate catalysts with low platinum

Details Hydrous phosphate catalysts with low platinum Hydrous phosphate catalysts with low platinum

2007-08-14

2007-08-14

Weiner, Laura (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Having earth feature

C429S047000, C429S006000, C429S006000, C429S010000

Reexamination Certificate

active

10672270

ABSTRACT:
A device is provided having a cathode capable of catalytically reducing oxygen, an anode capable of catalytically oxidizing hydrogen, and an electrolyte in contact with both the anode and cathode. The cathode and/or anode contain transition-metal phosphates with the formula M1—M2PxOy. zH2O, where M1is a platinum group metal and M2is a transition metal.

REFERENCES:
Chiang et al, “Electronically Conductive Phospho-Olivines as Lithium Storage Electrodes”, Massachusetts Institute of Technology, Oct. 2002, vol. 1, pp. 123-128.
AI et al, “Oxidation By Iron Phosphate Catalyst”, Journal of Molecular Catalysis A: Chemical, 2000, vol. 159, pp. 19-24.
Johnstone et al, “Hydrogenation of Alkenes Over Palladium and Platinum Metals Supported on a Variety of Metal (IV) Phosphates”, Journal of Molecular Catalysis A: Chemical, 2003, vol. 191, pp. 289-294.
Swider-Lyons et al, “Low-Platinum Hydrous Metal Oxides for PEMFC Cathodes”, NRL DOE review, May 19, 2003, pp. 1-5.
Gadgil et al, “Study of FePO4 Catalys”, Journal of Solid State Chemistry, 1994, vol. 111, pp. 357-364.
McCormick et al, “Methane Partial Oxidation by Silica-Supported Iron Phosphate Catalysts. Influence of Iron Phosphate Content on Selectivity and Catalyst Structure”, Topics of Catalysis, 2000, vol. 10, pp. 115-122.
Vedrine et al, “Partial Oxidation Reactions on Phosphate-Based Catalysts”, Topics of Catalysts, 2000, vol. 11/12, pp. 147-152.
Muneyama et al, “Characteristics of Iron Phosphate and Its Catalytic Activity for Oxidative Dehydrogenation of Isobutyric Acid”, Bull. Chem. Soc. Jpn,, 1996, vol. 69, pp. 509-511.

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