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公开(公告)号：US20240024823A1
公开(公告)日：2024-01-25
申请号：US18343597
申请日：2023-06-28
Applicant: California Institute of Technology
Inventor： Eowyn Lucas , Harry A. Atwater , Chengxiang Xiang
CPC classification number: B01D61/445 , B01D69/02 , B01D61/461 , C02F1/4693 , B01D2325/42 , B01D2325/04 , B01D2313/345 , C02F2101/10
Abstract: Systems and methods for catalyzed asymmetric bipolar membranes are described. Catalyzed asymmetric bipolar membranes can sustain desired current densities under low operational voltage for prolonged time periods. Catalyzed asymmetric bipolar membranes can be implemented in electrodialysis cells for various applications such as carbon capture.
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公开(公告)号：US20220144673A1
公开(公告)日：2022-05-12
申请号：US17522241
申请日：2021-11-09
Applicant: California Institute of Technology
Inventor： Chengxiang Xiang , Harry A. Atwater , Ibadillah A. Digdaya
Abstract: Disclosed are electrochemical systems that include an electrodialyzer and a vapor-fed CO2 reduction (CO2R) cell to capture and convert CO2 from ocean water. The electrodialyzer includes a stack of bipolar membrane electrodialysis (BPMED) cells between end electrodes. The electrodialzyer incorporates monovalent cation exchange membranes (M-CEMs) that prevent the transfer of multivalent cations between adjacent cell compartments, allowing continuous recirculation of electrolytes and solutions, and thus providing a safer and more scaling-free electrodialysis system. In some embodiments, the electrodialyzer may be configured to replace the water-splitting reaction at end electrodes with one-electron, reversible redox couples in solution at the electrodes. As a result, in the entire electrodialyzer stack, there is no bond-making, bond-breaking reactions and there is no gas generation, which significantly simplifies the cell design and improves operational safety. The systems provide a unique technological pathway for CO2 capture and conversion from ocean water with only electrochemical processes.
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公开(公告)号：US20190264338A1
公开(公告)日：2019-08-29
申请号：US16286467
申请日：2019-02-26
Applicant: California Institute of Technology
Inventor： Christoph D. Karp , Alec S. Ho , Xinghao Zhou , Chengxiang Xiang , Nathan S. Lewis
Abstract: A solar fuels generation system includes a first reactor that contains a first solution in which a charge carrier is reduced to a reduced charge carrier. The system also includes a second reactor that contains a second solution in which the reduced charge carrier reduces protons so as to generate hydrogen gas.
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公开(公告)号：US09645109B2
公开(公告)日：2017-05-09
申请号：US14683596
申请日：2015-04-10
Inventor： Jian Jin , Chengxiang Xiang , John M. Gregoire , Aniketa A. Shinde , Dan W. Guevarra , Ryan J. Jones , Martin R. Marcin , Slobodan Mitrovic
IPC: G01N27/403 , G01N27/417 , G01N27/416
CPC classification number: G01N27/4035 , G01N27/416 , G01N27/417
Abstract: Electrochemical or electrochemical and photochemical experiments are performed on a collection of samples by suspending a drop of electrolyte solution between an electrochemical experiment probe and one of the samples that serves as a test sample. During the electrochemical experiment, the electrolyte solution is added to the drop and an output solution is removed from the drop. The probe and collection of samples can be moved relative to one another so the probe can be scanned across the samples.
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公开(公告)号：US20240218526A1
公开(公告)日：2024-07-04
申请号：US18542516
申请日：2023-12-15
Inventor： Harry A. Atwater , Chengxiang Xiang , Zhiyuan Qi , Monica Hwang , Richard F. Zheng , Wei Wang , Soowhan Kim , Ryan Benavides , Daniel R. Bottenus
IPC: C25B1/04 , C25B9/15 , C25B9/23 , C25B11/032 , C25B11/052 , C25B11/063 , C25B11/065 , C25B11/075 , C25B11/081 , C25B11/085 , C25B15/08
CPC classification number: C25B1/04 , C25B9/15 , C25B9/23 , C25B11/032 , C25B11/052 , C25B11/063 , C25B11/065 , C25B11/075 , C25B11/081 , C25B11/085 , C25B15/08
Abstract: Systems and methods for generating high-pressure hydrogen are described. The hydrogen generation systems include hybrid electrolyzer systems and catalytic compression systems. The systems can directly generate gaseous hydrogen at a pressure of at least 700 bar.
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Patent Agency Ranking
公开(公告)号：US20200378016A1
公开(公告)日：2020-12-03
申请号：US16994842
申请日：2020-08-17
Applicant: The California Institute of Technology
Inventor： Chengxiang Xiang , Xinghao Zhou , Ke Sun , Ryan J. Jones , Nathan S. Lewis
Abstract: A solar fuels generator includes an anolyte and a catholyte in contact with a separator. The separator is configured such that the pH of the anolyte and the pH of the catholyte are each held at a steady state pH level during operation of the solar fuels generator. The steady state pH level of the anolyte is different from the steady state pH level of the catholyte.
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公开(公告)号：US10242806B2
公开(公告)日：2019-03-26
申请号：US15982832
申请日：2018-05-17
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Nathan S. Lewis , Joshua M. Spurgeon , William C. West , Chengxiang Xiang
Abstract: The solar fuels generator includes an ionically conductive separator between a gaseous first phase and a second phase. A photoanode uses one or more components of the first phase to generate cations during operation of the solar fuels generator. A cation conduit is positioned provides a pathway along which the cations travel from the photoanode to the separator. The separator conducts the cations. A second solid cation conduit conducts the cations from the separator to a photocathode.
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公开(公告)号：US20150292095A1
公开(公告)日：2015-10-15
申请号：US14569497
申请日：2014-12-12
Inventor： Joel A. Haber , Jian Jin , Chengxiang Xiang , John M. Gregoire , Ryan J. Jones , Dan W. Guevarra , Aniketa A. Shinde
CPC classification number: C25B11/0452 , C25B1/02 , C25C7/02 , H01M4/9016
Abstract: An Oxygen Evolution Reaction (OER) catalyst includes a metal oxide that includes oxygen, cerium, and one or more second metals. In some instances, the cerium is 10 to 80 molar % of the metals in the metal oxide and/or the catalyst includes two or more second metals. The OER catalyst can be included in or on an electrode. The electrode can be arranged in an oxygen evolution system such that the Oxygen Evolution Reaction occurs at the electrode.
Abstract translation: 氧进化反应（OER）催化剂包括包含氧，铈和一种或多种第二金属的金属氧化物。 在一些情况下，铈是金属氧化物中金属的10至80摩尔％，和/或催化剂包括两种或更多种第二种金属。 OER催化剂可以包含在电极中或电极上。 电极可以排列在放氧系统中，使得氧气进化反应发生在电极处。
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公开(公告)号：US20240182340A1
公开(公告)日：2024-06-06
申请号：US18061381
申请日：2022-12-02
Applicant: California Institute of Technology
Inventor： Harry A. Atwater , Chengxiang Xiang , Ibadillah A. Digdaya
IPC: C02F9/00 , B01D53/62 , B01D61/44 , B01D61/50 , B01D69/02 , B01D69/08 , B01D69/12 , B01D69/14 , B01D71/26 , B01D71/52 , B01J31/06 , B01J35/06 , C01F11/18
CPC classification number: C02F9/00 , B01D53/62 , B01D61/445 , B01D61/50 , B01D69/02 , B01D69/08 , B01D69/1216 , B01D69/144 , B01D69/145 , B01D71/261 , B01D71/262 , B01D71/5211 , B01J31/06 , B01J35/065 , C01F11/181 , B01D2251/304 , B01D2251/604 , B01D2257/504 , C02F2001/007
Abstract: A dual-pathway system for CO2 capture in both acidified and basified streams is provided. The system may be embodied in an off-shore stand-alone facility to allow for the operation of oceanic CO2 capture to be more efficient and cost effective. Systems maintain high environmental standards by containing all intermediate acidic and alkaline solutions in a closed system so that the effluent discharged back into the ocean is at the similar pH and salinity as the feed oceanwater, with only CO2 removed. Acid and base produced by an electrodialyzer unit is used to achieve oceanwater decarbonization via gaseous CO2 removal and solid CaCO3 precipitates removal. The system is configured to require the processing of a very small fraction of the total oceanwater intake for the acid-base generation process.
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公开(公告)号：US20180251903A1
公开(公告)日：2018-09-06
申请号：US15909764
申请日：2018-03-01
Applicant: The California Institute of Technology
Inventor： Chengxiang Xiang , Xinghao Zhou , Ke Sun , Ryan J. Jones , Nathan S. Lewis
Abstract: A solar fuels generator includes an anolyte and a catholyte in contact with a separator. The separator is configured such that the pH of the anolyte and the pH of the catholyte are each held at a steady state pH level during operation of the solar fuels generator. The steady state pH level of the anolyte is different from the steady state pH level of the catholyte.
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