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Johnson Matthey Fuel Cells Limited patents


Recent patent applications related to Johnson Matthey Fuel Cells Limited. Johnson Matthey Fuel Cells Limited is listed as an Agent/Assignee. Note: Johnson Matthey Fuel Cells Limited may have other listings under different names/spellings. We're not affiliated with Johnson Matthey Fuel Cells Limited, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "J" | Johnson Matthey Fuel Cells Limited-related inventors


Ternary platinum alloy catalyst

A platinum alloy catalyst ptxy, wherein x is nickel, cobalt, chromium, copper, titanium or manganese and y is tantalum or niobium, characterised in that in the alloy the atomic percentage of platinum is 46-75 at %, of x is 1-49 at % and of y is 1-35 at %; provided that the alloy is not 66 at % pt20 at % cr14 at % ta or 50 at % pt, 25 at % co, 25 at % ta is disclosed. The catalyst has particular use as an oxygen reduction catalyst in fuel cells, and in particular in phosphoric acid fuel cells.. ... Johnson Matthey Fuel Cells Limited

Use of an anode catalyst layer

A method of operating a fuel cell having an anode, a cathode and a polymer electrolyte membrane disposed between the anode and the cathode, includes feeding the anode with an impure hydrogen stream having low levels of carbon monoxide up to 5 ppm, and wherein the anode includes an anode catalyst layer including a carbon monoxide tolerant catalyst material, wherein the catalyst material includes: (i) a binary alloy of ptx, wherein x is a metal selected from the group consisting of rhodium and osmium, and wherein the atomic percentage of platinum in the alloy is from 45 to 80 atomic % and the atomic percentage of x in the alloy is from 20 to 55 atomic %; and (ii) a support material on which the ptx alloy is dispersed; wherein the total loading of platinum group metals (pgm) in the anode catalyst layer is from 0.01 to 0.2 mgpgm/cm2.. . ... Johnson Matthey Fuel Cells Limited

Process

A process for the recovery of a perfluorosulphonic acid ionomer from a component comprising a perfluorosulphonic acid ionomer is disclosed, the process comprising immersing the component comprising the perfluorosulphonic acid ionomer in a solvent comprising an aliphatic diol and heating. Also disclosed is the use of the recovered perfluorosulphonic acid ionomer, for example in to prepared a proton conducting membrane or a catalyst ink.. ... Johnson Matthey Fuel Cells Limited

Membrane-seal assembly

The invention includes a reinforced membrane-seal assembly that comprises a reinforcing component, ion-conducting material, and seal material. The reinforcing component comprises a central region comprising a plurality of apertures extending from a first surface to a second surface of the reinforcing component, the central region having a first aperture area density; an inner peripheral border region surrounding the central region, where the inner peripheral border region is devoid of apertures; and an outer peripheral border region comprising a plurality of apertures extending from the first surface to the second surface of the reinforcing component, the outer peripheral border region having a second aperture area density. ... Johnson Matthey Fuel Cells Limited

Catalyst

. . A catalyst comprising particles of iridium oxide and a metal oxide (m oxide), wherein the metal oxide is selected from the group consisting of a group 4 metal oxide, a group 5 metal oxide, a group 7 metal oxide and antimony oxide, wherein the catalyst is prepared by subjecting a precursor mixture to flame spray pyrolysis, wherein the precursor mixture comprises a solvent, an iridium oxide precursor and a metal oxide precursor is disclosed. The catalyst has particular use in catalysing the oxygen evolution reaction.. ... Johnson Matthey Fuel Cells Limited

Membrane electrode assembly

The invention includes a catalysed membrane and membrane electrode assembly. The membrane and membrane electrode assembly comprise an ion-conducting membrane component comprising an ion-conducting membrane, an anode catalyst layer, and a cathode catalyst layer. ... Johnson Matthey Fuel Cells Limited

Anode catalyst layer for use in a proton exchange membrane fuel cell

A catalyst layer including: (i) a first catalytic material, wherein the first catalytic material facilitates a hydrogen oxidation reaction suitably selected from platinum group metals, gold, silver, base metals or an oxide thereof; and (ii) a second catalytic material, wherein the second catalytic material facilitates an oxygen evolution reaction, wherein the second catalytic material includes iridium or iridium oxide and one or more metals m or an oxide thereof, wherein m is selected from the group consisting of transition metals and sn, wherein the transition metal is preferably selected from the group ivb, vb and vib; and the first catalytic material is supported on the second catalytic material. The catalyst can be used in fuel cells, supported on electrodes or polymeric membranes for increasing tolerance to cell voltage reversal.. ... Johnson Matthey Fuel Cells Limited

Membrane-seal assembly

Disclosed is a reinforced membrane-seal assembly, the reinforced membrane-seal assembly including: an inner region and a border region and wherein the inner region includes ion-conducting component and the border region includes seal component; wherein first and second planar porous reinforcing components each extend across the inner region into the border region and wherein the pores of each of the first and second planar porous reinforcing components in the inner region are impregnated with ion-conducting component and the pores of each of the first and second planar porous reinforcing components in the border region are impregnated with seal component is disclosed. Also disclosed is a catalyst-coated reinforced membrane-seal assembly, a reinforced membrane-seal electrode assembly and an electrochemical device including the reinforced membrane-seal assembly.. ... Johnson Matthey Fuel Cells Limited

Process

. . A process for manufacturing a reinforced membrane-seal assembly includes: (i) providing a carrier material; (ii) providing a planar reinforcing component having one or more first regions including pores and a second region including pores, the first regions being patches and non-continuous and the second region surrounding the first regions and being continuous; (iii) depositing an ion-conducting component; (iv) drying the ion-conducting component; (v) depositing a seal component; (vi) drying the seal component (vii) removing the carrier material. In embodiments, ion-conducting component fills the pores in the first regions and seal component fills the pores in the second region; steps (ii), (iii) and (v) can be carried out in any order; step (iv) is carried out subsequent to step (iii); step (vi) is carried out subsequent to step (v); and steps (iv) and (vi) are carried out subsequent to step (ii). ... Johnson Matthey Fuel Cells Limited

Catalyst layer

A catalyst layer including: (i) a platinum-containing electrocatalyst; (ii) an oxygen evolution reaction electrocatalyst; (iii) one or more carbonaceous materials selected from the group consisting of graphite, nanofibres, nanotubes, nanographene platelets and low surface area, heat-treated carbon blacks wherein the one or more carbonaceous materials do not support the platinum-containing electrocatalyst; and (iv) a proton-conducting polymer and its use in an electrochemical device are disclosed.. . ... Johnson Matthey Fuel Cells Limited








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