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).
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Publication number: 20230086549Abstract: The invention regards a method for electrochemical ammonia synthesis, comprising the steps of: providing at least one electrolysis cell; contacting the cathode with a source of lithium cations, nitrogen, and protons; and subjecting the cathode to a continuous pulsed cathode potential, including a pulsed cathodic current load, wherein the cathode potential is pulsed between the lithium reduction potential and a less negative cathode potential, whereby ammonia is synthesized.Type: ApplicationFiled: March 5, 2021Publication date: March 23, 2023Inventors: Suzanne Zamany Andersen, Ib Chorkendorff, Debashish Chakraborty, Peter christian Kjærgaard Vesborg, Jakob Kibsgaard, Jens Kehlet Nørskov, Vanessa Jane Bukas
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Patent number: 10930486Abstract: 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: GrantFiled: November 11, 2015Date of Patent: February 23, 2021Assignee: DANMARKS TEKNISKE UNIVERSITETInventors: Daniel Bøndergaard Trimarco, Peter Christian Kjærgaard Vesborg, Thomas Pedesen, Ole Hansen, Ib Chorkendorff
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Patent number: 10005067Abstract: 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: GrantFiled: May 26, 2015Date of Patent: June 26, 2018Assignee: Danmarks Tekniske UniversitetInventors: Debasish Chakraborty, Ib Chorkendorff, Jakob Lind Olsen, Hugo José Lopes Silva, Morten Godtfred Nielsen
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Patent number: 9878309Abstract: 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: GrantFiled: October 30, 2014Date of Patent: January 30, 2018Assignee: Danmarks Tekniske UniversitetInventors: Christian Nagstrup Conradsen, Sine Ellemann Olesen, Debasish Chakraborty, Ib Chorkendorff
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Publication number: 20170338090Abstract: 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: ApplicationFiled: November 11, 2015Publication date: November 23, 2017Inventors: Daniel Bøndergaard Trimarco, Peter Christian Kjærgaard Vesborg, Thomas Pedesen, Ole Hansen, Ib Chorkendorff
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Publication number: 20170157593Abstract: 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: ApplicationFiled: May 26, 2015Publication date: June 8, 2017Inventors: Ib Chorkendorff, Debasish Chakraborty, Jakob Lind Olsen, Hugo José Lopes Silva, Morten Godtfred Nielsen
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Publication number: 20170001177Abstract: 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: ApplicationFiled: October 30, 2014Publication date: January 5, 2017Inventors: Christian Nagstrup Conradsen, Sine Ellemann Olesen, Debasish Chakraborty, Ib Chorkendorff
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Patent number: 9312545Abstract: 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: GrantFiled: July 16, 2010Date of Patent: April 12, 2016Assignee: DANMARKS TEKNISKE UNIVERSITETInventors: Jens Nørskov, Jeffrey Greeley, Ifan Stephens, Alexander S. Bondarenko, Tobias Johansson, Heine Anton Hansen, Thomas Jaramillo, Jan Rossmeisl, Ib Chorkendorff
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Publication number: 20160068973Abstract: 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: ApplicationFiled: April 25, 2014Publication date: March 10, 2016Applicant: TECHNICAL UNIVERSITY OF DENMARKInventors: Ifan Stephens, Arnau Verdaguer-Casadevall, Björn Wickman, Jan Rossmeisl, Paolo Malacrida, Ib Chorkendorff, Samira Siahrostami, Marí Escudero-Escribano, Mohammedreza Karamad
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Publication number: 20150325861Abstract: 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: ApplicationFiled: July 5, 2013Publication date: November 12, 2015Inventors: 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
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Publication number: 20150295249Abstract: 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: ApplicationFiled: November 21, 2013Publication date: October 15, 2015Inventors: Ifan Erfyl Lester Stephens, Maria Escudero Escribano, Arnau Verdaguer-Casadevall, Paolo Malacrida, Ulrik Grønbjerg Vej-Hansen, Jakob Schiøtz, Jan Rossmeisl, Ib Chorkendorff
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Publication number: 20120214083Abstract: 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: ApplicationFiled: July 16, 2010Publication date: August 23, 2012Applicant: DANMARKS TEKNISKE UNIVERSITETInventors: Jens Nørskov, Jeffrey Greeley, Ifan Stephens, Alexander S. Bondarenko, Tobias Johansson, Heine Anton Hansen, Thomas Jaramillo, Jan Rossmeisl, Ib Chorkendorff
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Patent number: 6602355Abstract: 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: GrantFiled: October 22, 2001Date of Patent: August 5, 2003Assignee: Haldor Topsoe A/SInventors: Ib Alstrup, Ib Chorkendorff
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Publication number: 20020079023Abstract: 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: ApplicationFiled: October 22, 2001Publication date: June 27, 2002Applicant: Haldor Topsoe A/SInventors: Ib Alstrup, Ib Chorkendorff