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公开(公告)号：US20230369608A1
公开(公告)日：2023-11-16
申请号：US18028135
申请日：2021-09-28
发明人： Yasuhiro Seki , Kiyotaka Nagamori , Tomoteru Mizusaki , Satoshi Aoki , Yoko Nakamura , Makoto Nishibetto , Yuki Takii
IPC分类号： H01M4/90 , H01M4/86 , H01M4/88 , H01M8/1004
CPC分类号： H01M4/9058 , H01M4/9083 , H01M4/8657 , H01M4/8807 , H01M4/9016 , H01M8/1004 , H01M4/8605
摘要： The catalyst for electrodes comprises: a porous support which has nanopores having a pore diameter of from 1 nm to 20 nm and micropores having a pore diameter of less than 1 nm; and a plurality of catalyst particles which are supported by the support. The catalyst particles are supported by both inner portions and outer portions of mesopores of the support, and contain Pt (zerovalent). If an analysis of the particle size distribution of the catalyst particles is performed using three-dimensional reconstructed images obtained through a STEM-based electron tomography measurement, the condition of formula (S1), namely (100×(N10/N20)≤8.0) is satisfied, where N10 represents the number of noble metal particles that are not in contact with pores having a pore diameter of 1 nm or more; and N20 represents the number of catalyst particles that are supported by the inner portions of the nanopores of the support.
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公开(公告)号：US20230335760A1
公开(公告)日：2023-10-19
申请号：US18026553
申请日：2021-09-28
发明人： Yasuhiro Seki , Tomoteru Mizusaki , Kiyotaka Nagamori , Satoshi Aoki , Makoto Nishibetto , Yoshiyuki Wada , Yoko Nakamura
IPC分类号： H01M4/92 , H01M4/86 , H01M8/1004
CPC分类号： H01M4/926 , H01M4/8605 , H01M4/921 , H01M8/1004
摘要： This catalyst for electrodes comprises: a porous carbon support which has nanopores having a pore diameter of from 1 nm to 20 nm; and a plurality of catalyst particles which are supported by the support. The catalyst particles contain Pt (zerovalent), and are supported by both inner portions and outer portions of the nanopores of the support. If an analysis of the particle size distribution of the catalyst particles is performed using three-dimensional reconstructed images obtained through a STEM-based electron tomography measurement, the proportion of the catalyst particles supported by the inner portions of the nanoparticles is 50% or more: at least one nanopore is formed in a cubic image having a side of from 20 nm to 50 nm, said cubic image being obtained from a three-dimensional reconstructed image of a catalyst aggregate; and this nanopore has the shape of a continuously extending interconnected pore.
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公开(公告)号：US20230126404A1
公开(公告)日：2023-04-27
申请号：US17910153
申请日：2021-03-16
发明人： Yoshiyuki Wada , Tomoteru Mizusaki , Kiyotaka Nagamori , Satoshi Aoki , Hiroki Shiina , Yasuhiro Seki
IPC分类号： H01M4/92 , H01M8/1004 , H01M4/86
摘要： The present invention provides an electrode catalyst which has excellent catalytic activity, and which can contribute to reducing the cost of a polymer electrolyte fuel cell (PEFC). According to the present invention, an electrode catalyst includes a hollow carrier including nanopores having a pore size of 1 to 20 nm, and a plurality of catalyst particles. The catalyst particles are supported both inside and outside the nanopores of the carrier, and comprise (zero-valent) Pt, and when a particle size distribution analysis of the catalyst particles is carried out using a three-dimensional reconstructed image obtained by electron beam tomography measurement employing STEM, the conditions of formula (S1): 100×(N10/N20)≤8.0 are satisfied (in the formula, N10 is the number of noble metal particles not in contact with a pore having a pore size of 1 nm or more, and N20 is the number of catalyst particles supported inside the nanopores of the carrier).
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公开(公告)号：US09893365B2
公开(公告)日：2018-02-13
申请号：US15102438
申请日：2015-08-27
IPC分类号： H01M4/92 , H01M4/86 , B01J27/22 , B01J35/08 , H01M4/90 , H01M8/1004 , H01M8/10 , H01M8/1018
CPC分类号： H01M4/8657 , B01J27/22 , B01J35/08 , H01M4/86 , H01M4/90 , H01M4/9016 , H01M4/9075 , H01M4/92 , H01M4/925 , H01M8/10 , H01M8/1004 , H01M2008/1095
摘要： To provide electrode catalyst which has the catalyst activity and durability at a practically durable level and contributes to lowering of the cost in comparison with the conventional Pt/C catalyst. The electrode catalyst has a support and catalyst particles supported on the support. The catalyst particle has the core part, the first shell part formed on the core part, and the second shell part formed on the first shell part. The core part contains W compound including at least W carbide, the first shell part contains simple Pd, and the second shell part contains simple Pt.
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公开(公告)号：US20210184228A1
公开(公告)日：2021-06-17
申请号：US17052693
申请日：2019-05-15
IPC分类号： H01M4/92 , H01M8/1004 , H01M4/86 , H01M8/1018 , H01M4/88
摘要： Provide an electrode catalyst with excellent catalytic activity that can contribute to cost reduction of PEFC. The electrode catalyst includes a hollow carbon carrier with mesopores with a pore size of 2 to 50 nm and a catalyst particle supported on the carrier. The catalyst particle is supported on both inside and outside the mesopores of the carrier, and have a core portion formed on the carrier and a shell portion covering at least a part of the surface of the core portion. Pd is included in the core portion, and Pt is included in the shell portion, and when the analysis of the particle size distribution of the catalyst particles using the three dimensional reconstructed image obtained by electron beam tomography (electron tomography) measurement using an STEM is performed, the ratio of the catalyst particles supported inside the mesopore is 50% or more.
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公开(公告)号：US20200290024A1
公开(公告)日：2020-09-17
申请号：US16084043
申请日：2017-02-15
IPC分类号： B01J23/89 , C07C209/36
摘要： Provided is a catalyst mixture which, in a nitro group hydrogenation reaction of an aromatic nitro compound having a structure in which nitro groups and halogen atoms are directly bonded as substituents to a ring skeleton of the same ring while separated from each other, is capable of selectively hydrogenating the nitro groups and sufficiently reducing the removal of the halogen atoms from the ring. This catalyst mixture includes a catalyst which is used in a hydrogenation reaction of at least one among one or more nitro groups present in a reactant, which is an aromatic nitro compound having a structure in which one or more nitro groups and one or more halogen atoms are directly bonded as substituents to a ring skeleton of the same ring while separated from each other. This catalyst mixture further includes a base.
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公开(公告)号：US20190039051A1
公开(公告)日：2019-02-07
申请号：US16078314
申请日：2017-01-24
摘要： To provide electrode catalyst which has the catalyst activity equal to or more than the Pt/Pd/C catalyst. The electrode catalyst 10A has a support 2 and catalyst particles 3a supported on the support. The catalyst particle has the core part 4 formed on the support, the first shell part 5a formed on the core part and the second shell part 6a formed on a part of the surface of the first shell part. The core part contains Pd, the first shell part contains Pt, and the second shell part contains the Ti oxide. A percentage of the Pt R1Pt (atom %) and a percentage of the Ti derived from the Ti oxide R1Ti (atom %) in an analytical region near a surface measured by X-ray photoelectron spectroscopy satisfy the conditions of the equation (1): 1.00≤(R1Ti/R1Pt)≤2.50.
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公开(公告)号：US09461313B2
公开(公告)日：2016-10-04
申请号：US15022651
申请日：2015-03-27
发明人： Kiyotaka Nagamori , Tomoteru Mizusaki , Yoko Nakamura , Takuya Tsubaki , Hiroshi Igarashi , Yasuhiro Seki
摘要： Provided is an electrode catalyst that can exhibit sufficient performance, is suitable for mass production, and is suitable for reducing production costs, even when containing a relatively high concentration of chlorine. The electrode catalyst has a core-shell structure including a support; a core part that is formed on the support; and a shell part that is formed so as to cover at least one portion of the surface of the core part. The electrode catalyst concurrently fulfills conditions expressed by the following formulae (1) and (2): (X1/M)≦1.2 . . . (1) (X2/M)≦47.0 . . . (2) (in the formula (1) and the formula (2), M represents an amount of substance (number of atoms) of one or more constituent metal elements of the shell part, X1 represents an amount of substance (number of atoms) of bromine (Br), and X2 represents an amount of substance (number of atoms) of chlorine (Cl)).
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公开(公告)号：US20240120503A1
公开(公告)日：2024-04-11
申请号：US18275864
申请日：2022-02-09
IPC分类号： H01M4/92 , H01M4/86 , H01M4/88 , H01M8/1004
CPC分类号： H01M4/926 , H01M4/8605 , H01M4/88 , H01M8/1004 , H01M2008/1095
摘要： The method of producing an electrode catalyst having a porous carbon support that has nanopores having a pore diameter of 1 to 20 nm and a BET specific surface area of 700 to 900 m2/g, and catalyst particles containing Pt supported on the support, includes: a first step for preparing a powder in which the catalyst particles are supported on the support; and a second step for accommodating the powder obtained through the first step in a flow-type reactor, flowing NH3 gas through the reactor under conditions of a concentration of 10 to 100% and a pressure of 0.1 MPa to 0.5 MPa, and regulating the temperature in the reactor to 500° C. or more and less than the decomposition temperature of ammonia, keeping for 5 to 10 hours to chemically react the powder and the NH3 gas.
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公开(公告)号：US20240105965A1
公开(公告)日：2024-03-28
申请号：US18275873
申请日：2022-02-09
IPC分类号： H01M4/92 , H01M4/88 , H01M8/1004
CPC分类号： H01M4/926 , H01M4/8828 , H01M4/921 , H01M8/1004
摘要： The method produces an electrode catalyst having a porous carbon support that has nanopores having a pore diameter of 1 to 20 nm, micropores having a pore diameter of less than 1 nm, and a BET specific surface area of 1000 to 1500 m2/g, and catalyst particles containing Pt supported on the support, including: preparing a powder in which the catalyst particles are supported on the support by using the support and raw materials of the catalyst particle; and accommodating the powder obtained through the first step in a flow-type reactor, flowing ammonia gas through the reactor under conditions of a concentration of 10 to 100% and a pressure of 0.1 MPa to 0.5 MPa, and regulating the temperature in the reactor to 500° C. or more and less than the decomposition temperature of ammonia, keeping for 5 to 10 hours to chemically react the powder and the ammonia gas.
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