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公开(公告)号：US20240141508A1
公开(公告)日：2024-05-02
申请号：US18278798
申请日：2022-03-28
IPC分类号： C25B1/04 , C25B9/21 , C25B9/65 , C25B11/054 , C25B11/081 , C25B13/08 , C25B15/023 , C25B15/08
CPC分类号： C25B1/04 , C25B9/21 , C25B9/65 , C25B11/054 , C25B11/081 , C25B13/08 , C25B15/023 , C25B15/08
摘要： A production method for producing a hydrogen gas through electrolysis of water is provided. The production method includes: decreasing a current density to a range that is greater than 0 A/cm2 and less than a value used in the electrolysis and in which the electrolysis does not stop; holding the current density for 1 second or more while introducing a gas to at least a hydrogen generating electrode; and decreasing the current density to a value at which the electrolysis does not take place so as to stop the electrolysis. It is preferable that the gas is a gas that is electrochemically inert to a fuel cell reaction. It is also preferable that the gas is at least one selected from the group consisting of nitrogen and a noble gas.
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公开(公告)号：US20240120502A1
公开(公告)日：2024-04-11
申请号：US18275779
申请日：2022-02-01
CPC分类号： H01M4/926 , H01M4/8605 , H01M4/8882
摘要： An electrode catalyst is provided in which degradation of catalytic action over time is suppressed. The electrode catalyst includes a mesoporous carbon support having pores, and catalyst metal particles supported in at least some of the pores. The ratio r/R of the mean particle size r of the catalyst metal particles to the modal pore size R of the pores is from 0.01 to 0.6, and the mean particle size r is 6 nm or less. The modal pore size R of the pores is preferably from 2 to 50 nm.
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3.发明申请公开(公告)号：US20220271299A1
公开(公告)日：2022-08-25
申请号：US17626326
申请日：2020-07-22
发明人： Takuya KITABATAKE , Joji MIKI
摘要： A catalyst layer for a fuel cell contains a support and a catalyst supported on the support. The support contains a titanium oxide having a crystal phase of Ti2O. The ratio of total abundance of trivalent Ti and divalent Ti (W2) to abundance of tetravalent Ti (W1), W2/W1, is 0.1 or more as determined on the surface of the catalyst layer by X-ray photoelectron spectroscopy. The catalyst is preferably made of at least one metal selected from platinum, iridium, and ruthenium, or an alloy thereof. Also, the catalyst layer for a fuel cell preferably further contains an ionomer, and the ratio of mass of the ionomer (I) to mass of the catalyst-supporting support (S), I/S, is preferably 0.06 or more and 0.23 or less.
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公开(公告)号：US20230049734A1
公开(公告)日：2023-02-16
申请号：US17792459
申请日：2021-02-12
发明人： Takuya KITABATAKE , Joji MIKI , Haruka WATANABE
IPC分类号： H01M4/92 , H01M8/1018
摘要： An electrode catalyst layer for a fuel cell includes a catalyst/support composite including a support and a catalyst supported thereon. The support contains a titanium oxide. The surface of the catalyst/support composite has an oxide of at least one element selected from the group consisting of niobium, tantalum, zirconium, and silicon. The ratio A2/A1 is from 0.35 to 1.70, wherein A1 is the atomic ratio of titanium on a surface of the catalyst layer and A2 is the atomic ratio of a total of niobium, tantalum, zirconium, and silicon on the surface of the catalyst layer, A1 and A2 being measured by X-ray photoelectron spectroscopy. The titanium oxide preferably has a composition TiOx (0.5 ≤ x
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