Patents by Inventor Ib Chorkendorff

Ib Chorkendorff 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).

  • Patent number: 10005067
    Abstract: The invention contributes to a cost effective way to solve the problem of trace ammonia removal from a hydrogen and nitrogen containing gas. The set of catalysts of the invention selectively oxidized ammonia in ppm concentration even in gas mixtures containing hydrogen gas in concentrations of three orders of magnitude higher than the concentration of ammonia.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: June 26, 2018
    Assignee: Danmarks Tekniske Universitet
    Inventors: Debasish Chakraborty, Ib Chorkendorff, Jakob Lind Olsen, Hugo José Lopes Silva, Morten Godtfred Nielsen
  • Patent number: 9878309
    Abstract: The present invention relates to a bimetallic catalyst for ammonia oxidation, a method for producing a bimetallic catalyst for ammonia oxidation and a method for tuning the catalytic activity of a transition metal. By depositing an overlayer of less catalytic active metal onto a more catalytic active metal, the total catalytic activity is enhanced.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: January 30, 2018
    Assignee: Danmarks Tekniske Universitet
    Inventors: Christian Nagstrup Conradsen, Sine Ellemann Olesen, Debasish Chakraborty, Ib Chorkendorff
  • Publication number: 20170338090
    Abstract: The invention relates to a device (10) for extracting volatile species from a liquid (20) connected to an inlet of an analysis instrument, such as a mass spectrometer (MS). The device has a chamber (4), a membrane (5) forming a barrier for the liquid at zero differential pressure between the inside and the outside of the chamber, and allowing passage of the volatile species at zero differential pressure between the inside and the outside of the chamber. The device has an inlet capillary channel (3) to feed in a carrier gas and prevent back-diffusion from the chamber, and an outlet capillary channel (6) which provides a significant pressure reduction, e.g. from atmospheric pressure in the chamber (4) to near-vacuum suitable for an MS. The invention combines the best of two worlds, i.e. the fast time-response of a DEMS system and the high sensitivity of a MIMS system, since a differential pumping stage is not needed.
    Type: Application
    Filed: November 11, 2015
    Publication date: November 23, 2017
    Inventors: Daniel Bøndergaard Trimarco, Peter Christian Kjærgaard Vesborg, Thomas Pedesen, Ole Hansen, Ib Chorkendorff
  • Publication number: 20170157593
    Abstract: The invention contributes to a cost effective way to solve the problem of trace ammonia removal from a hydrogen and nitrogen containing gas. The set of catalysts of the invention selectively oxidised ammonia in ppm concentration even in gas mixtures containing hydrogen gas in concentrations of three orders of magnitude higher than the concentration of ammonia.
    Type: Application
    Filed: May 26, 2015
    Publication date: June 8, 2017
    Inventors: Ib Chorkendorff, Debasish Chakraborty, Jakob Lind Olsen, Hugo José Lopes Silva, Morten Godtfred Nielsen
  • Publication number: 20170001177
    Abstract: The present invention relates to a bimetallic catalyst for ammonia oxidation, a method for producing a bimetallic catalyst for ammonia oxidation and a method for tuning the catalytic activity of a transition metal. By depositing an overlayer of less catalytic active metal onto a more catalytic active metal, the total catalytic activity is enhanced.
    Type: Application
    Filed: October 30, 2014
    Publication date: January 5, 2017
    Inventors: Christian Nagstrup Conradsen, Sine Ellemann Olesen, Debasish Chakraborty, Ib Chorkendorff
  • Patent number: 9312545
    Abstract: The present invention concerns electrode catalysts used in fuel cells, such as proton exchange membrane (PEM) fuel cells. The invention is related to the reduction of the noble metal content and the improvement of the catalytic efficiency by low level substitution of the noble metal to provide new and innovative catalyst compositions in fuel cell electrodes. The novel electrode catalysts of the invention comprise a noble metal selected from Pt, Pd and mixtures thereof alloyed with a further element selected from Sc, Y and La as well as any mixtures thereof, wherein said alloy is supported on a conductive support material.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: April 12, 2016
    Assignee: DANMARKS TEKNISKE UNIVERSITET
    Inventors: Jens Nørskov, Jeffrey Greeley, Ifan Stephens, Alexander S. Bondarenko, Tobias Johansson, Heine Anton Hansen, Thomas Jaramillo, Jan Rossmeisl, Ib Chorkendorff
  • Publication number: 20160068973
    Abstract: The present invention relates to a novel alloy catalyst material for use in the synthesis of hydrogen peroxide from oxygen and hydrogen, or from oxygen and water. The present invention also relates to a cathode and an electrochemical cell comprising the novel catalyst material, and the process use of the novel catalyst material for synthesising hydrogen peroxide from oxygen and hydrogen, or from oxygen and water.
    Type: Application
    Filed: April 25, 2014
    Publication date: March 10, 2016
    Applicant: TECHNICAL UNIVERSITY OF DENMARK
    Inventors: Ifan Stephens, Arnau Verdaguer-Casadevall, Björn Wickman, Jan Rossmeisl, Paolo Malacrida, Ib Chorkendorff, Samira Siahrostami, Marí Escudero-Escribano, Mohammedreza Karamad
  • Publication number: 20150325861
    Abstract: The present invention concerns electrode catalysts used in fuel cells, such as proton exchange membrane (PEM) fuel cells. The invention is related to the reduction of the noble metal content and the improvement of the catalytic5 efficiency by low level substitution of the noble metal to provide new and innovative catalyst compositions in fuel cell electrodes. The novel electrode catalysts of the invention comprise a noble metal selected from Pt and Pd alloyed with a lanthanide metal.
    Type: Application
    Filed: July 5, 2013
    Publication date: November 12, 2015
    Inventors: Ifan Erfyl Lester Stephens, Jan Rossmeist, Maria Escudero Escribano, Amau Verdaguer-Casadevall, Paolo Malacrida, Ulrick Grønbjerg Vej-Hansen, Brian Peter Knudsen, Anders Konge Jepsen, Ib Chorkendorff
  • Publication number: 20150295249
    Abstract: The present invention concerns electrode catalysts used in fuel cells, such as proton exchange membrane (PEM) fuel cells. The invention is related to the reduction of the noble metal content and the improvement of the catalytic efficiency by low level substitution of the noble metal to provide new and innovative catalyst compositions in fuel cell electrodes. The novel electrode catalysts of the invention comprise a noble metal selected from Pt and Pd alloyed with an alkaline earth metal.
    Type: Application
    Filed: November 21, 2013
    Publication date: October 15, 2015
    Inventors: Ifan Erfyl Lester Stephens, Maria Escudero Escribano, Arnau Verdaguer-Casadevall, Paolo Malacrida, Ulrik Grønbjerg Vej-Hansen, Jakob Schiøtz, Jan Rossmeisl, Ib Chorkendorff
  • Publication number: 20120214083
    Abstract: The present invention concerns electrode catalysts used in fuel cells, such as proton exchange membrane (PEM) fuel cells. The invention is related to the reduction of the noble metal content and the improvement of the catalytic efficiency by low level substitution of the noble metal to provide new and innovative catalyst compositions in fuel cell electrodes. The novel electrode catalysts of the invention comprise a noble metal selected from Pt, Pd and mixtures thereof alloyed with a further element selected from Sc, Y and La as well as any mixtures thereof, wherein said alloy is supported on a conductive support material.
    Type: Application
    Filed: July 16, 2010
    Publication date: August 23, 2012
    Applicant: DANMARKS TEKNISKE UNIVERSITET
    Inventors: Jens Nørskov, Jeffrey Greeley, Ifan Stephens, Alexander S. Bondarenko, Tobias Johansson, Heine Anton Hansen, Thomas Jaramillo, Jan Rossmeisl, Ib Chorkendorff
  • Patent number: 6602355
    Abstract: A method for enhancing the protection of high temperature alloys containing iron, nickel and chromium against high temperature corrosion by carburization or metal dusting is achieved by depositing a thin layer of a metal selected from one or more of the noble metals, precious metals, metals from groups IVA, IVB, and group VA, VB of the Periodic Table and mixtures thereof with a thickness in the range of from 0.01 to 10 &mgr;m on the surface to be protected, and annealing the treated surface in an inert atmosphere at a predetermined temperature for a sufficient time to render the treated surface resistant to carburization or metal dusting.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: August 5, 2003
    Assignee: Haldor Topsoe A/S
    Inventors: Ib Alstrup, Ib Chorkendorff
  • Publication number: 20020079023
    Abstract: A method for enhancing the protection of high temperature alloys containing iron, nickel and chromium against high temperature corrosion by carburization or metal dusting is achieved by depositing a thin layer of a metal selected from one or more of the noble metals, precious metals, metals from groups IVA, IVB, and group VA, VB of the Periodic Table and mixtures thereof with a thickness in the range of from 0.01 to 10 &mgr;m on the surface to be protected, and annealing the treated surface in an inert atmosphere at a predetermined temperature for a sufficient time to render the treated surface resistant to carburization or metal dusting.
    Type: Application
    Filed: October 22, 2001
    Publication date: June 27, 2002
    Applicant: Haldor Topsoe A/S
    Inventors: Ib Alstrup, Ib Chorkendorff