Patents by Inventor Bingjun Xu

Bingjun Xu 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: 11634322
    Abstract: The present disclosure is directed to the integration of direct air capture of carbon dioxide with thermochemical water splitting, the latter optionally driven by solar energy. The disclosure is also directed to a process comprising extracting carbon dioxide from an air stream by contacting the air-stream with an alkali metal ion-transition metal oxide of empirical formula AxMO2 (0.1<x?1), where A represents the alkali metal ion comprising sodium ion, potassium ion, or a combination thereof and M comprises iron, manganese, or a combination thereof to form a transition metal composition comprising an oxidized ion extracted-transition metal oxide.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: April 25, 2023
    Assignees: California Institute of Technology, University of Delaware
    Inventors: Mark E. Davis, Bingjun Xu, Casper O. Brady
  • Patent number: 11512156
    Abstract: Poly(aryl piperidinium) polymers with pendant cationic groups are provided which have an alkaline-stable cation, piperidinium, introduced into a rigid aromatic polymer backbone free of ether bonds. Hydroxide exchange membranes or hydroxide exchange ionomers formed from these polymers exhibit superior chemical stability, hydroxide conductivity, decreased water uptake, good solubility in selected solvents, and improved mechanical properties in an ambient dry state as compared to conventional hydroxide exchange membranes or ionomers. Hydroxide exchange membrane fuel cells comprising the poly(aryl piperidinium) polymers with pendant cationic groups exhibit enhanced performance and durability at relatively high temperatures.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: November 29, 2022
    Assignee: University of Delaware
    Inventors: Yushan Yan, Keda Hu, Junhua Wang, Lan Wang, Bingjun Xu, Yun Zhao
  • Publication number: 20210009726
    Abstract: Poly(aryl piperidinium) polymers with pendant cationic groups are provided which have an alkaline-stable cation, piperidinium, introduced into a rigid aromatic polymer backbone free of ether bonds. Hydroxide exchange membranes or hydroxide exchange ionomers formed from these polymers exhibit superior chemical stability, hydroxide conductivity, decreased water uptake, good solubility in selected solvents, and improved mechanical properties in an ambient dry state as compared to conventional hydroxide exchange membranes or ionomers. Hydroxide exchange membrane fuel cells comprising the poly(aryl piperidinium) polymers with pendant cationic groups exhibit enhanced performance and durability at relatively high temperatures.
    Type: Application
    Filed: September 28, 2018
    Publication date: January 14, 2021
    Inventors: Yushan Yan, Keda Hu, Junhua Wang, Lan Wang, Bingjun Xu, Yun Zhao
  • Publication number: 20200317512
    Abstract: The present disclosure is directed to the integration of direct air capture of carbon dioxide with thermochemical water splitting, the latter optionally driven by solar energy. The disclosure is also directed to a process comprising extracting carbon dioxide from an air stream by contacting the air-stream with an alkali metal ion-transition metal oxide of empirical formula AxMO2 (0.1<x?1), where A represents the alkali metal ion comprising sodium ion, potassium ion, or a combination thereof and M comprises iron, manganese, or a combination thereof to form a transition metal composition comprising an oxidized ion extracted-transition metal oxide.
    Type: Application
    Filed: April 1, 2020
    Publication date: October 8, 2020
    Inventors: Mark E. Davis, Bingjun Xu, Casper O. Brady
  • Patent number: 10290890
    Abstract: Poly(aryl piperidinium) polymers are provided which have an alkaline-stable cation, piperidinium, introduced into a rigid aromatic polymer backbone free of ether bonds. Hydroxide exchange membranes or hydroxide exchange ionomers formed from these polymers exhibit superior chemical stability, hydroxide conductivity, decreased water uptake, good solubility in selected solvents, and improved mechanical properties in an ambient dry state as compared to conventional hydroxide exchange membranes or ionomers. Hydroxide exchange membrane fuel cells comprising the poly(aryl piperidinium) polymers exhibit enhanced performance and durability at relatively high temperatures.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: May 14, 2019
    Assignee: Universty of Delaware
    Inventors: Yushan Yan, Bingjun Xu, Junhua Wang, Yun Zhao
  • Publication number: 20190036143
    Abstract: Poly(aryl piperidinium) polymers are provided which have an alkaline-stable cation, piperidinium, introduced into a rigid aromatic polymer backbone free of ether bonds. Hydroxide exchange membranes or hydroxide exchange ionomers formed from these polymers exhibit superior chemical stability, hydroxide conductivity, decreased water uptake, good solubility in selected solvents, and improved mechanical properties in an ambient dry state as compared to conventional hydroxide exchange membranes or ionomers. Hydroxide exchange membrane fuel cells comprising the poly(aryl piperidinium) polymers exhibit enhanced performance and durability at relatively high temperatures.
    Type: Application
    Filed: September 28, 2018
    Publication date: January 31, 2019
    Inventors: Yushan Yan, Bingjun Xu, Junhua Wang, Yun Zhao
  • Patent number: 9206042
    Abstract: The present disclosure is directed to methods of catalytically reducing carbon dioxide, each method comprising: contacting a composition comprising a spinel-type transition iron oxide with an alkali metal carbonate, bicarbonate, or mixture thereof at a first temperature to form CO, and an alkali metal ion-transition metal oxide; hydrolytically extracting at least a portion of alkali metal ions from the alkali metal ion-transition metal oxide by the reaction with CO2 and liquid H2O at a second temperature; and thermochemically reducing the transition metal composition of the second step at a third temperature, with the associated formation of O2.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: December 8, 2015
    Assignee: California Institute of Technology
    Inventors: Mark E. Davis, Bingjun Xu, Yashodhan Bhawe
  • Publication number: 20150056129
    Abstract: The present disclosure is directed to methods of catalytically reducing carbon dioxide, each method comprising: contacting a composition comprising a spinel-type transition iron oxide with an alkali metal carbonate, bicarbonate, or mixture thereof at a first temperature to form CO, and an alkali metal ion-transition metal oxide; hydrolytically extracting at least a portion of alkali metal ions from the alkali metal ion-transition metal oxide by the reaction with CO2 and liquid H2O at a second temperature; and thermochemically reducing the transition metal composition of the second step at a third temperature, with the associated formation of O2.
    Type: Application
    Filed: November 5, 2014
    Publication date: February 26, 2015
    Inventors: MARK E. DAVIS, BINGJUN XU
  • Patent number: 8940269
    Abstract: The present invention is directed to a method of thermochemical forming H2, O2, or a combination thereof from water, said method comprising the steps of contacting a composition comprising a spinel-type transition metal oxide of formula M3O4 with an alkali metal carbonate bicarbonate, or mixture thereof in the presence of H2O to form H2, CO2, and an alkali metal ion-transition metal oxide; hydrolytically extracting at least a portion of alkali metal ions from the alkali metal ion-transition metal oxide by the reaction with CO2 and liquid H2O; and thermochemically reducing the resulting oxidized-transition metal oxide. The thermochemical reduction of CO2 based on analogous methods is also disclosed.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: January 27, 2015
    Assignee: California Institute of Technology
    Inventors: Mark E. Davis, Bingjun Xu, Yashodhan Bhawe
  • Patent number: 8937197
    Abstract: The invention provides a method for producing organic carbonates via the reaction of alcohols and carbon monoxide with oxygen adsorbed on a metallic gold or gold alloy catalyst.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: January 20, 2015
    Assignee: President and Fellows of Harvard College
    Inventors: Cynthia M. Friend, Robert J. Madix, Bingjun Xu
  • Patent number: 8889908
    Abstract: The invention provides a method for producing amides via the reaction of aldehydes and amines with oxygen adsorbed on a metallic silver or silver alloy catalyst. An exemplary reaction is shown in Scheme 1: (I), (II), (III).
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: November 18, 2014
    Assignee: President and Fellows of Harvard College
    Inventors: Robert J. Madix, Ling Zhou, Bingjun Xu, Cynthia M. Friend, Cassandra G. Freyschlag
  • Publication number: 20140221679
    Abstract: The invention provides a method for producing organic carbonates via the reaction of alcohols and carbon monoxide with oxygen adsorbed on a metallic gold or gold alloy catalyst.
    Type: Application
    Filed: July 16, 2012
    Publication date: August 7, 2014
    Applicant: President and Fellows of Harvard College
    Inventors: Cynthia M. Friend, Robert J. Madix, Bingjun Xu
  • Publication number: 20130266504
    Abstract: The present invention is directed to a method of thermochemical forming H2, O2, or a combination thereof from water, said method comprising the steps of contacting a composition comprising a spinel-type transition metal oxide of formula M3O4 with an alkali metal carbonate bicarbonate, or mixture thereof in the presence of H2O to form H2, CO2, and an alkali metal ion-transition metal oxide; hydrolytically extracting at least a portion of alkali metal ions from the alkali metal ion-transition metal oxide by the reaction with CO2 and liquid H2O; and thermochemically reducing the resulting oxidized-transition metal oxide. The thermochemical reduction of CO2 based on analogous methods is also disclosed.
    Type: Application
    Filed: April 2, 2013
    Publication date: October 10, 2013
    Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: MARK E. DAVIS, BINGJUN XU, YASHODHAN BHAWE
  • Publication number: 20130079556
    Abstract: The invention provides a method for producing amides via the reaction of aldehydes and amines with oxygen adsorbed on a metallic silver or silver alloy catalyst.
    Type: Application
    Filed: January 25, 2011
    Publication date: March 28, 2013
    Inventors: Robert J. Madix, Ling Zhou, Bingjun Xu, Cynthia M. Friend, Cassandra G. Freyschlag