Patents by Inventor David Thompsett
David Thompsett has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20130330651Abstract: A catalyst layer including an electrocatalyst and an oxygen evolution catalyst, wherein the oxygen evolution catalyst includes a crystalline metal oxide including: (i) one of more first metals selected from the group consisting of yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, magnesium, calcium, strontium, barium, sodium, potassium, indium, thallium, tin, lead, antimony and bismuth; (ii) one or more second metals selected from the group consisting of Ru, Ir, Os and Rh; and (iii) oxygen characterised in that: (a) the atomic ratio of first metal(s):second metal(s) is from 1:1.5 to 1.5:1 (b) the atomic ratio of (first metal(s)+second metal(s)):oxygen is from 1:1 to 1:2 is disclosed.Type: ApplicationFiled: December 14, 2011Publication date: December 12, 2013Applicant: Johnson Matthey Fuel Cells LimitedInventors: David Thompsett, Edward Anthony Wright, Janet Mary Fisher, Enrico Petrucco
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Publication number: 20130209912Abstract: A platinum alloy catalyst PtXY, wherein X is a transition metal (other than platinum, palladium or iridium) and Y is a transition metal (other than platinum, palladium or iridium) which is less leachable than X in an acidic environment, has an atomic percentage in the alloy of platinum is from 20.5-40 at %, of X is from 40.5-78.5 at % X and of Y is from 1-19.5 at %.Type: ApplicationFiled: July 21, 2011Publication date: August 15, 2013Applicant: JOHNSON MATTHEY FUEL CELLS LIMITEDInventors: Brian Ronald Charles Theobald, Sarah Caroline Ball, Rachel Louise O'Malley, David Thompsett, Graham Alan Hards
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Patent number: 8318373Abstract: An MEA comprising: (i) a central first conductive gas diffusion substrate having a first face and a second face; (ii) first and second catalyst layers each having a first and second face and wherein the first face of the first catalyst layer is in contact with the first face of the gas diffusion substrate and the first face of the second catalyst layer is in contact with the second face of the gas diffusion substrate; (iii) first and second electrolyte layers each having a first and second face and wherein the first face of the first electrolyte layer is in contact with the second face of the first catalyst layer and the first face of the second electrolyte layer is in contact with the second face of the second catalyst layer; (iv) third and fourth catalyst layers each having a first and second face and wherein the first face of the third catalyst layer is in contact with the second face of the first electrolyte layer and the first face of the fourth catalyst layer is in contact with the second face of the seType: GrantFiled: September 11, 2007Date of Patent: November 27, 2012Assignee: Johnson Matthey Fuel Cells LimitedInventors: Hanna Katariina Rajantie, Jonathan David Brereton Sharman, David Thompsett, David Emmerson Brown, Stephen Robert Tennison, Beverley Sowerby, Vlad Strelko
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Publication number: 20120214084Abstract: A catalyst layer includes (i) an electrocatalyst, and (ii) a water electrolysis catalyst, iridium or iridium oxide and one or more metals M or an oxide thereof, wherein M is selected from transition metals and/or Sn, with the exception of ruthenium. Such a catalyst layer has utility in fuel cells that experience high electrochemical potentials.Type: ApplicationFiled: August 18, 2010Publication date: August 23, 2012Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventors: Jonathan David Brereton Sharman, Brian Ronald Theobald, David Thompsett, Edward Anthony Wright
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Patent number: 8173324Abstract: A platinum alloy catalyst PtX, wherein the atomic percent of platinum in the bulk alloy is from 5 to 50 at %, the remaining being X, characterised in that the atomic percent of platinum at the surface of the alloy is from 10 to 80 at %, the remainder being X, provided that the at % of platinum at the surface of the alloy is at least 25% greater than the at % of platinum in the bulk alloy is disclosed.Type: GrantFiled: July 22, 2008Date of Patent: May 8, 2012Assignee: Johnson Matthey Public Limited CompanyInventors: Janet Mary Fisher, David Thompsett
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Publication number: 20120046161Abstract: 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.Type: ApplicationFiled: February 3, 2010Publication date: February 23, 2012Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventors: Sarah Ball, Thomas Robertson Ralph, Brian Ronald Theobald, David Thompsett
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Patent number: 8071503Abstract: An electrocatalyst, suitable for use in a fuel cell, comprises an alloy having a single crystalline phase, wherein the alloy consists of 5-95 at % palladium, 5-95 at % ruthenium and less than 10 at % of other metals, provided that the alloy does not consist of 50 at % palladium and 50 at % ruthenium.Type: GrantFiled: July 20, 2007Date of Patent: December 6, 2011Assignee: Johnson Matthey Public Limited CompanyInventors: Janet Mary Fisher, David Thompsett
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Patent number: 7901835Abstract: A platinum alloy catalyst can be used as a fuel cell catalyst. The platinum alloy is a PtAuX alloy wherein X is one or more metals chosen from the group consisting of transition metals, and wherein the alloy contains 40-97% Pt, 1-40% Au and 2-20% X. Electrodes, catalysed membranes and membrane electrode assemblies comprising the catalyst are also disclosed.Type: GrantFiled: July 27, 2005Date of Patent: March 8, 2011Assignee: Johnson Matthey Public Limited CompanyInventors: Brian Elliott Hayden, Christopher Edward Lee, Claire Mormiche, David Thompsett
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Patent number: 7851095Abstract: An anode structure for incorporation into a fuel cell includes a first region having one or more electrocatalysts, in which the first region is adjacent to the fuel inlet when the anode structure is incorporated into a fuel cell, and a second region having one or more electrocatalysts, in which the second region is adjacent to the fuel outlet when the anode structure is incorporated into a fuel cell. The first region is better at promoting the electrochemical oxidation of carbon monoxide than the second region.Type: GrantFiled: May 19, 2005Date of Patent: December 14, 2010Assignee: Johnson Matthey Public Limited CompanyInventors: Sarah Caroline Ball, David Thompsett
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Publication number: 20100196789Abstract: A platinum alloy catalyst PtX, wherein the atomic percent of platinum in the bulk alloy is from 5 to 50 at %, the remaining being X, characterised in that the atomic percent of platinum at the surface of the alloy is from 10 to 80 at %, the remainder being X, provided that the at % of platinum at the surface of the alloy is at least 25% greater than the at % of platinum in the bulk alloy is disclosed.Type: ApplicationFiled: July 22, 2008Publication date: August 5, 2010Inventors: Janet Mary Fisher, David Thompsett
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Compound having a pyrochlore-structure and its use as a catalyst carrier in water gas shift reaction
Patent number: 7704916Abstract: A compound of formula (Na0.33A0.66)2B2O7-? wherein A is one or more metals chosen from the lanthanide metals; B is one or more metals chosen from Ti, Sn, Ge, Ru, Mn, Ir, Os and Pb; and ? is a number in the range 0-1 is disclosed. Water gas shift catalysts comprising precious metals such as gold dispersed on the (Na0.33A0.66)2B2O7-? compound are also disclosed.Type: GrantFiled: September 7, 2005Date of Patent: April 27, 2010Assignee: Johnson Matthey PLCInventors: Janet Mary Fisher, David Thompsett, Richard Ian Walton, Christopher Stuart Wright -
Publication number: 20100086831Abstract: An electrocatalyst, suitable for use in a fuel cell, comprises an alloy having a single crystalline phase, wherein the alloy consists of 5-95 at % palladium, 5-95 at % ruthenium and less than 10 at % of other metals, provided that the alloy does not consist of 50 at % palladium and 50 at % ruthenium.Type: ApplicationFiled: July 20, 2007Publication date: April 8, 2010Applicant: Johnson Matthey Public Limited CompanyInventors: Janet Mary Fisher, David Thompsett
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Patent number: 7678162Abstract: An electrically conducting gas diffusion substrate, capable of removing oxidisable impurities from an impure gas stream, which comprises an electrically conducting porous structure and a first catalytic component, wherein the first catalytic component comprises a first catalyst supported on an electrically non-conducting support is disclosed. In addition, an electrode, a membrane electrode assembly and a fuel cell each comprising said electrically conducting gas diffusion substrate is disclosed.Type: GrantFiled: January 7, 2008Date of Patent: March 16, 2010Assignee: Johnson Matthey Public Limited CompanyInventors: Susan Joy Cooper, Graham Alan Hards, Gregor Hoogers, Sarah Caroline Ball, David Thompsett
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Publication number: 20100047658Abstract: An ion-conducting membrane comprising a polymer component and a macrocyclic compound, wherein the macro-cyclic compound is functionalised with one or more ion-conducting groups is disclosed. The membrane is suitable for use in a fuel cell.Type: ApplicationFiled: June 14, 2007Publication date: February 25, 2010Applicants: Johnson Matthey Public Limited Company, University of ReadingInventors: Howard Matthew Colquhoun, Zhixue Zhu, David Thompsett, Nadia Michele Walsby
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Publication number: 20100009232Abstract: An MEA comprising: (i) a central first conductive gas diffusion substrate having a first face and a second face; (ii) first and second catalyst layers each having a first and second face and wherein the first face of the first catalyst layer is in contact with the first face of the gas diffusion substrate and the first face of the second catalyst layer is in contact with the second face of the gas diffusion substrate; (iii) first and second electrolyte layers each having a first and second face and wherein the first face of the first electrolyte layer is in contact with the second face of the first catalyst layer and the first face of the second electrolyte layer is in contact with the second face of the second catalyst layer; (iv) third and fourth catalyst layers each having a first and second face and wherein the first face of the third catalyst layer is in contact with the second face of the first electrolyte layer and the first face of the fourth catalyst layer is in contact with the second face of the seType: ApplicationFiled: September 11, 2007Publication date: January 14, 2010Applicants: Johnson Matthey Public Limited Company, MAST Carbon International LTD, C2 Chandler ConsultingInventors: Hanna Katariina Rajantie, Jonathan David Brereton Sharman, David Thompsett, David Emmerson Brown, Stephen Robert Tennison, Beverley Sowerby, Vlad Strelko
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Publication number: 20080199762Abstract: A platinum alloy catalyst can be used as a fuel cell catalyst. The platinum alloy is a PtAuX alloy wherein X is one or more metals chosen from the group consisting of transition metals, and wherein the alloy contains 40-97% Pt, 1-40% Au and 2-20% X. Electrodes, catalysed membranes and membrane electrode assemblies comprising the catalyst are also disclosed.Type: ApplicationFiled: July 27, 2005Publication date: August 21, 2008Applicant: Johnson Matthey Public Limited CompanyInventors: Brian Elliott Hayden, Christopher Edward Lee, Claire Mormiche, David Thompsett
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Publication number: 20080187817Abstract: An electrically conducting gas diffusion substrate, capable of removing oxidisable impurities from an impure gas stream, which comprises an electrically conducting porous structure and a first catalytic component, wherein the first catalytic component comprises a first catalyst supported on an electrically non-conducting support is disclosed. In addition, an electrode, a membrane electrode assembly and a fuel cell each comprising said electrically conducting gas diffusion substrate is disclosed.Type: ApplicationFiled: January 7, 2008Publication date: August 7, 2008Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventors: Susan Joy Cooper, Graham Alan Hards, Gregor Hoogers, Sarah Caroline Ball, David Thompsett
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Patent number: 7396516Abstract: A three-way catalyst (TWC) composition comprises a manganese-containing oxygen storage component (OSC) and at least one optionally doped alumina wherein where the at least one alumina is gamma-alumina it is doped with at least one of a rare earth metal, silicon, germanium, phosphorus, arsenic, calcium, strontium or barium.Type: GrantFiled: November 20, 2001Date of Patent: July 8, 2008Assignee: Johnson Matthey Public Limited CompanyInventors: Janet Mary Fisher, Timothy Ian Hyde, David Thompsett
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Patent number: 7338732Abstract: An electrically conducting gas diffusion substrate, capable of removing oxidizable impurities from an impure gas stream, which comprises an electrically conducting porous structure and a first catalytic component, wherein the first catalytic component comprises a first catalyst supported on an electrically non-conducting support is disclosed. In addition, an electrode, a membrane electrode assembly and a fuel cell each comprising said electrically conducting gas diffusion substrate is disclosed.Type: GrantFiled: June 14, 2000Date of Patent: March 4, 2008Assignee: Johnson Matthey Public Limited CompanyInventors: Susan Joy Cooper, Graham Alan Hards, Gregor Hoogers, Sarah Caroline Ball, David Thompsett
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Publication number: 20080039536Abstract: A sol includes metal oxide nanoparticles and stabiliser ions dispersed in an aqueous liquid. The nanoparticles include a metal selected from the group of platinum, palladium, rhodium, iridium, ruthenium and osmium and the molar ratio of metal: stabiliser ions is at least 0.7. A method of preparing supported catalyst materials includes contacting the sols with support materials.Type: ApplicationFiled: June 17, 2005Publication date: February 14, 2008Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventors: Janet Fisher, David Thompsett